Tech

May 14, 2012

NASA’s Marshall Center completes wind tunnel testing for Dream Chaser® space system

NASA’s Marshall Space Flight Center in Huntsville, Ala., successfully completed wind tunnel testing for Sierra Nevada Corp. Space Systems of Louisville, Colo. The test will provide aerodynamic data that will aid in the design of the new Dream Chaser® Space System.

During tests at Marshall’s wind tunnel facility, a scale model of SNC’s Dream Chaser orbital crew vehicle was mounted on a scale model of the United Launch Alliance’s Atlas V launch vehicle.

More than 400 data runs were performed at subsonic, transonic and supersonic speeds to study the effects of how air moves past the model. Nine full-stack configurations were tested over a Mach range of .4, or 304 miles per hour at sea level, to Mach 5, or 3,800 miles per hour at sea level, at various launch vehicle roll angles.

The data generated from this test series, coupled with data from computational fluid dynamics studies, will define the aerodynamic characteristics of the Dream Chaser – Atlas V launch stack during the ascent phase of flight. Obtaining this data will enable higher-fidelity loads analysis, better definition of launch vehicle performance, and will aid in further refining Dream Chaser’s trajectory design for orbital vehicle launches.

“We’re glad Marshall could support SNC in completing these wind tunnel tests quickly and affordably and early in the design phase,” said Teresa Vanhooser, manager of the Flight Programs and Partnerships Office at Marshall. “Our trisonic wind tunnel and engineering staff helps partners understand the aerodynamic integrity and stability of spacecraft and launch vehicles, like the Dream Chaser, over a variety of wind speeds and phases of flight.”

Mark Sirangelo, corporate vice president and head of SNC’s Space Systems, said: “The Dream Chaser Program is grateful for the opportunity to leverage the experience, expertise, and resources of Marshall, made possible by the unique government-commercial partnership created through NASA’s Commercial Crew Development Program. Sierra Nevada Corporation looks forward to expanding our successful relationship with Marshall, as well as creating new business opportunities in the Huntsville area.”

Marshall’s Aerodynamic Research Facility’s 14-inch trisonic wind tunnel is an intermittent, blow-down tunnel that operates from high-pressure storage to either vacuum or atmospheric exhaust. The facility is capable of conducting tests in the subsonic, transonic and supersonic mach ranges using its two interchangeable test sections. Subsonic Mach numbers are below Mach 1, the speed of sound, or 760 miles per hour at sea level, while transonic speeds approach and are slightly above Mach 1. The facility can achieve a maximum supersonic Mach number of 5, or five times the speed of sound.

SNC is currently one of the NASA Commercial Crew Development partners awarded funding under a Space Act Agreement to mature their Dream Chaser orbital crew transportation system. NASA’s CCDev effort is being led by NASA’s Kennedy Space Center and supported by NASA technical experts across the agency, including the Marshall Center for a variety of technical areas.

The effort to define the aerodynamic characteristics of the Dream Chaser Space System is being conducted under a reimbursable Space Act Agreement funded by SNC and executed with the support of aerodynamicists and wind tunnel experts from the Marshall Center and United Launch Alliance.




All of this week's top headlines to your email every Friday.


 
 

 
NASA JPL image

NASA analysis: 11 trillion gallons to replenish California drought losses

NASA JPL image NASA satellite data reveal the severity of California’s drought on water resources across the state. This map shows the trend in water storage between September 2011 and September 2014. It will take about 11 tr...
 
 
NASA photograph by George Hale

NASA’s IceBridge Antarctic campaign wraps up

NASA photograph by George Hale A view from an IceBridge survey flight Nov. 3, 2014, showing a cloud’s shadow on crevassed Antarctic ice. NASA’s Operation IceBridge recently completed its 2014 Antarctic campaign, marking the...
 
 

NASA’s 2014 HS3 hurricane mission investigated four tropical cyclones

NASA photograph NASA’s Global Hawk takes off into the sunset after mission wrap-up at NASA Wallops and heads back to NASA Armstrong. NASA’s Hurricane and Severe Storms Sentinel, or HS3, mission investigated four tropical cyclones in the 2014 Atlantic Ocean hurricane season: Cristobal, Dolly, Edouard and Gonzalo. The storms affected land areas in the Atlantic...
 

 

NASA tests software that may help increase flight efficiency, decrease aircraft noise

NASA researchers Dec. 12 began flight tests of computer software that shows promise in improving flight efficiency and reducing environmental impacts of aircraft, especially on communities around airports. Known as ASTAR, or Airborne Spacing for Terminal Arrival Routes, the software is designed to give pilots specific speed information and guidance so that planes can be...
 
 
nasa-app-challenge

Help U.S. cope with climate change: Enter NASA-USGS data app challenge

NASA in partnership with the U.S. Geological Survey is offering more than $35,000 in prizes to citizen scientists for ideas that make use of climate data to address vulnerabilities faced by the United States in coping with clim...
 
 
dryden-social3

Event introduces attendees to NASA’s aviation contributions

  NASA is transforming aviation by reducing aircraft environmental impacts, enhancing safety and leading the way in revolutionary new technologies. Those are some of the key ideas from a two-day NASA Aeronautics Research M...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>