HPCwire: Ranger Simulations Help Quiet Jet's Roar

The Leading Source for Global News and Information Covering the Ecosystem of High Productivity Computing

HPCwire >> Off the Wire

June 24, 2009

Ranger Simulations Help Quiet Jet's Roar

NASA research on engine noise relies on Ranger to enable first of their kind simulations

June 24 -- If you've ever lived near the airport, or sat in the back row of a 747, you know that jets are noisy. Today's aircraft have many sources of noise, but among them, the clatter of the exhaust system is a prime contributor. The higher the speed of the jet, the louder the noise it generates. But with the help of supercomputers, the roar overhead will soon be softened.

"Jet noise has been a subject of intensive research since early 1950s," said Ali Uzun, research associate at Florida State University. "One way to minimize jet noise is to modify the turbulent mixing process using special control devices, such as chevrons. Since noise is a by-product of the turbulent mixing of jet exhaust with ambient air, one can attempt to reduce the noise by modifying the mixing process."

In aerodynamics, a chevron refers to a triangle-shaped protrusion at the end of the nozzle. A crown of four to six chevrons set around the end of the nozzle has been shown to reduce turbulence, and consequently noise, as compared to the usual circular nozzle. Chevron-shaped nozzles are one of the most promising jet noise reduction devices, but it remains unclear why chevrons reduce noise, and how their designs can be optimized to minimize output.

Uzun uses the Ranger supercomputer at the Texas Advanced Computing Center (TACC) as a 21st century virtual wind-tunnel, simulating the turbulence and noise generated by virtual exhaust passing though a virtual engine.

Working with a grant from National Aeronautics and Space Administration (NASA), his research is answering fundamental questions about turbulence and noise, including how complex physical phenomena generate sound waves in a jet exhaust flow, and how noise suppression devices, such as chevrons, modify the way exhaust mixes with air to reduce noise levels.

For the rest of the story, visit http://www.tacc.utexas.edu/research/users/features/dynamic.php?m_b_c=nozzle.

-----

Source: Aaron Dubrow, Texas Advanced Computing Center

Article Tools

Share Options

(Digg, Technorati, more)

Subscribe

Subscribe to HPCwire

Discussion

There are 0 discussion items posted.

Join the Discussion

You must be a registered user in order to comment on HPCwire stories.

Members enjoy:

	Access to Special Content, including Podcasts, Webcasts, and Whitepapers and more!
	Ability to take an active role in the discussions that are shaping the HPC technology discipline!
	Special offers available only to HPCwire members!

Become a Registered User Today!

Registered Users Log in Here to Comment

Email Address:	Password (case sensitive)

Remember me	Forgot Password?

RSS Feeds

Feeds by Topic

Feeds by Industry

Feeds by Content Type

Feature Articles

The Week in Review

C-DAC announces plans for a petaflop system; IBM researchers are working on vertical integration techniques to extend Moore's Law another 15 years. We recap those stories and more in our weekly wrapup.
Read More...

Moscow State University Supercomputer Has Petaflop Aspirations

The Moscow State University supercomputer, Lomonosov, has been selected for a high-performance makeover, with the goal of tripling its processing power to achieve petaflop-level performance in 2010. T-Platforms, who developed and manufactured the supercomputer, is the odds-on favorite to lead the project.
Read More...

Intel Ups Performance Ante with Westmere Server Chips

Right on schedule, Intel has launched its Xeon 5600 processors, codenamed "Westmere EP." The 5600 represents the 32nm sequel to the Xeon 5500 (Nehalem EP) for dual-socket servers. Intel is touting better performance and energy efficiency, along with new security features, as the big selling points of the new Xeons.
Read More...

Read more HPCwire features...

Top Headlines

Australia Commissions Cray Supercomputer

Mar 19 | OfficialWire | New super to support intelligence work Down Under. Read more...

Intel Partners See 'Easy' Upgrade Path With Xeon 5600 Chips

Mar 18 | ChannelWeb | Westmere parts already showing up in HPC machines. Read more...

AMD: OEMs primed for Opteron 6100s

Mar 17 | The Register | But what about the tier ones? Read more...

Arrival of the Desktop Supercomputer

Mar 17 | Cadalyst Magazine | A new generation of workstations is changing the nature of technical computing. Read more...

Scheduling HPC In The Cloud

Mar 17 | Linux Magazine | Latest iteration of Sun Grid Engine able to tap into Cloud. Read more...

Read more headlines...

Featured Whitepapers

Virtualization for Aggregation And The vSMP Architecture™

Jan 12 | | In-depth look at vSMP Foundation server virtualization technology, technical implementation, use cases and capabilities. The technical whitepaper provides an architectural overview and details on the three vSMP Foundation products: vSMP Foundation for SMP, vSMP Foundation for Cluster and vSMP Foundation for Cloud.

Copper Cable Technologies for High Performance Computing

Jan 18 | | This white paper discusses Gore’s copper cable assemblies, and how they continue to exceed the standards for providing reliable, cost-effective solutions for high-performance computer applications.

View the White Paper Library

Multimedia

Webcast: Virtualized Data Center Roundtable

Join this online panel discussion for live Q&A with leading industry experts, analysts, and end-users to discuss the latest innovations, best practices, barriers to implementation, and measurable benefits of server virtualization with a particular focus on today's real world solutions.

Webcast: Watch SC09 Birds of a Feather Video: Scalable Fault-Tolerant HPC Supercomputers

Learn about scalable fault-tolerant architectures and examples of energy efficient and scalable supercomputing clusters using dual QDR InfiniBand to combine capacity computing with network failover capabilities with the help of programming languages such as MPI and a robust Linux cluster management package.

Webcast: High Performance Computing for a Smarter Planet

LIVE@SCO9: The IBM team discusses new innovations in hardware, software and services that help clients better understand their workloads and get insight from their R&D efforts. Technology demonstrations include the soon-to-be-released Power7 HPC processor, the DCS990 system with 2.4 petabytes of storage, the xCAT management tool, secure HPC cloud computing and more. Winners of two HPCwire Readers' and Editors’ Choice Awards! Take the IBM virtual tour at SC09 or more information go online to: http://www-03.ibm.com/systems/deepcomputing/sc09.html