Case Studies
Numerical Study of the Static and Pitching RISØ-B1-18 Airfoil
1 Introduction
The aim of this work is the better understanding of the physics of the aeroelastic motion of wind turbine blades in order to improve the numerical simulation of such dynamical systems. In previous works, both aerodynamic damping calculations and fully-coupled aeroelastic simulations of wind turbine blades were performed by using the CFD code EllipSys3D as a fluid flow model, and the aeroelastic code HAWC as a structural model [1, 2]. The results were compared with semi-empirical dynamic stall engineering models, such as the Beddoes-Leishman model [3]. However, the lack of experimental results in such configurations made it difficult to conclude which model was performing better. In order to clarify this issue, it was decided to come back to more basic cases for which experimental results exist in the litterature. Not many experimental campaigns exist for which the operational conditions (including Reynolds number, Mach number, etc...) are close to our concern, namely wind turbine applications. One of the rare experimental set-ups that meets these requirements is the measurements performed by Risø in the VELUX wind tunnel [4]. The airfoil profile that has been chosen for our comparative tests is the RISØ-B1-18 airfoil designed by Fuglsang et al [5].
The so-called Direct Numerical Simulation of the fluid flow dynamics (for which all the scales of the turbulent flow are simulated by the numerical code) around a turbine blade is still far out of reach of modern computers. Therefore, turbulence models have to be implemented in the numerical codes in order to reduce the computational costs to an acceptable size. Two types of turbulence modelling, which have been implemented in the Navier-Stokes code EllipSys3D, are considered in this paper. In a first place, the so-called Reynolds Averaged Navier-Stokes (RANS) approach using the k − ! SST turbulence model by Menter [6] has been implemented. The simulation of a wind turbine rotor with this model has proven to give sensible results [7] compared to the well-detailed measurements obtained during the NREL Unsteady Aerodynamics Experiment Phase VI performed by NREL at the NASA-Ames wind tunnel [8]. However, a more detailed study showed that the RANS approach alone was unable to correctly simulate the three-dimensional patterns in the flowfield around the 2D section of a pitching airfoil [9]. Conversely, the so-called Detached Eddy Simulation (DES) [10], which is a combination of a RANS approach in the vicinity of the blade and a Large Eddy Simulation (LES) in the far field, gave promising results [9]. inally, two-dimensional simulations using the k − ! SST model will be performed, mainly due to their low computational costs, and in order to evaluate the discrepancies that can be expected with such simulations compared to three-dimensional and experimental results. continue reading...
MSD of Wayne Township Cuts Costs, Streamlines Workflows with Centralized HP Printers and MFPs
In this age of increasing demands and tight budgets, school districts everywhere are constantly looking for ways to control operational expenses so they can redirect funds into the education processes. The Metropolitan School District (MSD) of Wayne Township in Indianapolis, Ind., is no exception, and that is why it is an early adopter
of technologies that will help control costs and redirect savings.
In 2005, Cannon IV, Inc., an HP Public Sector Elite partner, began working with MSD of Wayne Township to develop a new imaging and printing strategy. Wayne Township wanted to take a multi-phased approach to optimizing its imaging and printing environment across the school district. Their first objective was to better manage the existing fleet of output devices to reduce costs and optimize the imaging and printing infrastructure and workflows. This was accomplished with a district-wide managed print services agreement on the existing fleet of devices—over 1,600 printers at 24 locations. The next phase would address the needs of individual schools within
the school district.
The first school targeted for infrastructure and workflow optimization was the Chapel Hill 7th and 8th Grade Center. Teachers in this school had individual inkjet printers in their classrooms. They would use these devices to print master copies, which they would take to the copy room. There, they would wait in line for a copier to make class handouts. Surely there was a less costly, more efficient way? There was. Working with Cannon IV, the district centralized and consolidated its print infrastructure, standardizing on HP printers and multifunction printers (MFPs). As a result, MSD of Wayne Township streamlined workflows, cut waste, and reduced the cost per page by four cents, placing hundreds of thousands of dollars in savings back where it belongs: educating children. continue reading...
MSD of Wayne Township Cuts Costs, Streamlines Workflows with Centralized HP Printers and MFPs
In this age of increasing demands and tight budgets, school districts everywhere are constantly looking for ways to control operational expenses so they can redirect funds into the education processes. The Metropolitan School District (MSD) of Wayne Township in Indianapolis, Ind., is no exception, and that is why it is an early adopter
of technologies that will help control costs and redirect savings.
In 2005, Cannon IV, Inc., an HP Public Sector Elite partner, began working with MSD of Wayne Township to develop a new imaging and printing strategy. Wayne Township wanted to take a multi-phased approach to optimizing its imaging and printing environment across the school district. Their first objective was to better manage the existing fleet of output devices to reduce costs and optimize the imaging and printing infrastructure and workflows. This was accomplished with a district-wide managed print services agreement on the existing fleet of devices—over 1,600 printers at 24 locations. The next phase would address the needs of individual schools within
the school district.
The first school targeted for infrastructure and workflow optimization was the Chapel Hill 7th and 8th Grade Center. Teachers in this school had individual inkjet printers in their classrooms. They would use these devices to print master copies, which they would take to the copy room. There, they would wait in line for a copier to make class handouts. Surely there was a less costly, more efficient way? There was. Working with Cannon IV, the district centralized and consolidated its print infrastructure, standardizing on HP printers and multifunction printers (MFPs). As a result, MSD of Wayne Township streamlined workflows, cut waste, and reduced the cost per page by four cents, placing hundreds of thousands of dollars in savings back where it belongs: educating children. continue reading...
SANS Institute InfoSec Reading Room
Abstract
This practical is a case study of an Insurance Company’s migration to an enterprise-wide security system. It is the intent of this practical to provide a path to follow when creating or migrating to a security system. Initially, a primitive online security system was the only mechanism to control access to corporate data. The exposures were severe - there were no integrity controls outside of the online environment. Anyone with basic programming skills could add, change and/or delete production data.
A project plan was developed to identify tasks, assign resources and ensure milestones were met. The scope of the security initiative included creating an inventory of information assets, creating new objects (data within datasets), constructing new groups and granting the appropriate permissions for access to the objects. Training documentation was created to instruct the users how to access the new system, both in an interactive and batch mode. Mini boot camps were conducted to train the trainers, who in turn, provided mentoring and tutoring for the user community.. Additional staff was recruited from other departments to provide user support for the rollout. D-Day arrived and the rollout experience only minor glitches. All the exposures were mitigated to the satisfaction of internal and external auditors.
Before Snapshot – May 1998
The Bumper Insurance Company (BIC – not its real name) is operating in a 1980’s technology environment. There are no LANs or WANs, just 3270 (dumb – green screen) terminals linked by coax to the mainframe. In addition, BIC had previously acquired another insurance company and runs the acquired company’s applications on the BIC mainframe. A proprietary security system provides access control for the online applications; there is no provision for access controls outside of the online environment. What are our risks? How can we quantify the risks? continue reading...
3M Australia Moves Towards a Total Document Solution with HP Managed Print Services
3M is fundamentally a science-based company. It produces thousands of imaginative products such as Post-it notes and is a leader in scores of markets from healthcare and highway safety to office products, abrasives and adhesives. With recent annual global sales of US$2 billion, it has 75,000 employees and operates in more than 65 countries.
One of those is Australia where 3M is headquartered in Pymble, New South Wales. 3M Australia has 14 sites with more than 700 employees and generated recent annual sales of US$420 million.
3M Australia moves towards a total document solution with HP Managed Print Services
3M Australia had a multi-vendor fleet of 130 devices which was complex and expensive to manage and maintain. At a global level, 3M Group also felt that its print, copy and fax fleets were inefficient and expensive so from the headquarters in St Paul, Minnesota, it negotiated a global Managed Print Services (MPS) contract with HP.
SAVINGS AND EFFICIENCIES
In Australia, this five year MPS contract generated significant savings and efficiencies so with the agreement of the global HQ, it has recently been renewed. Under the agreement, 3M pays a monthly fee consisting of a base rate and a ‘click charge’ based on actual page volumes. The agreement also covers print cartridges and repair/maintenance services. continue reading...
3M Australia Moves Towards a Total Document Solution with HP Managed Print Services
Submitted by Webmaster on Mon, 12/20/2010 - 18:22
3M is fundamentally a science-based company. It produces thousands of imaginative products such as Post-it notes and is a leader in scores of markets from healthcare and highway safety to office products, abrasives and adhesives. With recent annual global sales of US$2 billion, it has 75,000 employees and operates in more than 65 countries.
One of those is Australia where 3M is headquartered in Pymble, New South Wales. 3M Australia has 14 sites with more than 700 employees and generated recent annual sales of US$420 million.
3M Australia moves towards a total document solution with HP Managed Print Services
3M Australia had a multi-vendor fleet of 130 devices which was complex and expensive to manage and maintain. At a global level, 3M Group also felt that its print, copy and fax fleets were inefficient and expensive so from the headquarters in St Paul, Minnesota, it negotiated a global Managed Print Services (MPS) contract with HP.
SAVINGS AND EFFICIENCIES
In Australia, this five year MPS contract generated significant savings and efficiencies so with the agreement of the global HQ, it has recently been renewed. Under the agreement, 3M pays a monthly fee consisting of a base rate and a ‘click charge’ based on actual page volumes. The agreement also covers print cartridges and repair/maintenance services. continue reading...
Schmidt Printing Expanding Variable-Data Capabilities—and Business—with HP Indigo
Submitted by Webmaster on Sat, 11/13/2010 - 09:27
Established in 1912 as a small, three-man commercial print shop, Schmidt Printing today is a major supplier of direct marketing and other print services. The Byron, Minnesota-based printer specializes in medium-run web printing for direct marketers and a variety of other customers, including magazine, newspaper and card pack publishers and multi-channel merchants.
In 2009, Schmidt expanded its capabilities further by adding digital printing capabilities to its offering.
“A year ago, one of our largest customers was looking for a way to print a huge quantity of short-run, personalized postcards—about 1,000 cards per run, and millions of them per week,” says Jeff Winter, Director of Sales and Marketing at Schmidt. “The only way to provide short-run quantities at the volume they were requesting was with digital printing technology.”
“That’s when we started looking for a single solution that could offer variable data while cost-effectively handle a high volume of short run jobs,” says Winter. Schmidt reached out to its parent company, Taylor Corporation in Mankato, Minnesota, to help identify digital technology options that would meet their customer’s request—and at a competitive price point. Taylor is one of the ten largest graphic arts companies in the world, with over 90 locations around the globe, and has a long history working with HP to provide end-to-end graphic arts solutions.
Working together with Taylor’s management team, Schmidt considered a number of digital printing solutions before selecting an HP Indigo W7200 Digital Press.
“Installation happened very fast,” recalls Winter. “I have to give HP kudos—within two months, we went from the purchase order to having the press on our floor and running live product.” continue reading...
Schmidt Printing Expanding Variable-Data Capabilities—and Business—with HP Indigo
Established in 1912 as a small, three-man commercial print shop, Schmidt Printing today is a major supplier of direct marketing and other print services. The Byron, Minnesota-based printer specializes in medium-run web printing for direct marketers and a variety of other customers, including magazine, newspaper and card pack publishers and multi-channel merchants.
In 2009, Schmidt expanded its capabilities further by adding digital printing capabilities to its offering.
“A year ago, one of our largest customers was looking for a way to print a huge quantity of short-run, personalized postcards—about 1,000 cards per run, and millions of them per week,” says Jeff Winter, Director of Sales and Marketing at Schmidt. “The only way to provide short-run quantities at the volume they were requesting was with digital printing technology.”
“That’s when we started looking for a single solution that could offer variable data while cost-effectively handle a high volume of short run jobs,” says Winter. Schmidt reached out to its parent company, Taylor Corporation in Mankato, Minnesota, to help identify digital technology options that would meet their customer’s request—and at a competitive price point. Taylor is one of the ten largest graphic arts companies in the world, with over 90 locations around the globe, and has a long history working with HP to provide end-to-end graphic arts solutions.
Working together with Taylor’s management team, Schmidt considered a number of digital printing solutions before selecting an HP Indigo W7200 Digital Press.
“Installation happened very fast,” recalls Winter. “I have to give HP kudos—within two months, we went from the purchase order to having the press on our floor and running live product.” continue reading...
Improved Change Management Drives Availability, Reduces Risk
In the past, much of that investment was targeted towards infrastructure design, including tried-and-true architectural fundamentals like hardware redundancy. But in recent years, the company pursued another priority: implementing management tools and processes to better quantify—and thereby reduce—the risk of application outages. This includes establishing best practices around change management procedures—which is why the company implemented HP Universal Configuration Management Database (CMDB) software.
Complex environment, complex interdependencies
The company’s requirements for more disciplined change management processes stem in large part from the complexity of its technology environment. From a hardware perspective, multiple data centers house a mix of mainframes—plus a few thousand distributed servers. These include a large mix of HP ProLiant BL460c G6 and BL680c G5 server blades, and ProLiant DL580 G5 servers as well as other HP servers; virtually all of the company’s x86 server hardware is HP, for instance.
This architecture, in turn, links to some 25,000 to 30,000 workstations for use by the company’s full-time and contract employees. On the software side, thousands of internet, mainframe and distributed applications serve the company’s internal and external customers. Applications data is maintained within hundreds of thousands of databases. continue reading...
Improved Change Management Drives Availability, Reduces Risk
In the past, much of that investment was targeted towards infrastructure design, including tried-and-true architectural fundamentals like hardware redundancy. But in recent years, the company pursued another priority: implementing management tools and processes to better quantify—and thereby reduce—the risk of application outages. This includes establishing best practices around change management procedures—which is why the company implemented HP Universal Configuration Management Database (CMDB) software.
Complex environment, complex interdependencies
The company’s requirements for more disciplined change management processes stem in large part from the complexity of its technology environment. From a hardware perspective, multiple data centers house a mix of mainframes—plus a few thousand distributed servers. These include a large mix of HP ProLiant BL460c G6 and BL680c G5 server blades, and ProLiant DL580 G5 servers as well as other HP servers; virtually all of the company’s x86 server hardware is HP, for instance.
This architecture, in turn, links to some 25,000 to 30,000 workstations for use by the company’s full-time and contract employees. On the software side, thousands of internet, mainframe and distributed applications serve the company’s internal and external customers. Applications data is maintained within hundreds of thousands of databases. continue reading...



