. 24/7 Space News .
Tunnel 9 personnel provide guidance for hypersonic experiment
by Staff Writers
Arnold AFB TX (AFNS) Sep 24, 2019

The Boundary Layer Transition, or BOLT, subscale model is tested in the Purdue University Mach-6 Quiet Tunnel. The aim of the basic science BOLT experiment, which is being sponsored by the Air Force Research Laboratory/Air Force Office of Scientific Research and conducted by the Johns Hopkins University Applied Physics Laboratory (JHU-APL), along with the University of Minnesota, Purdue University, Texas A and M University, AFRL Aerospace Systems Directorate, NASA Langley, CUBRC, VirtusAero and DLR in Germany, is to predict the state of the boundary layer, or the thin layer of air near the surface, on a new canonical geometry. Personnel at AEDC Hypervelocity Wind Tunnel 9 in White Oak, Maryland, recently provided sensor installation training to JHU-APL staff members. (Courtesy photo by Air Force Office of Scientific Research/Johns Hopkins University Applied Physics Laboratory)

When those conducting Air Force-sponsored basic science research in hypersonic aerodynamics needed some advice, they relied upon the expertise of engineers and technicians at Arnold Engineering and Development Complex Hypervelocity Wind Tunnel 9 in White Oak, Maryland.

Earlier this year, personnel from Tunnel 9 provided instrumentation installation training to members of the research team from the Johns Hopkins University Applied Physics Laboratory, or JHU-APL, in Laurel, Maryland, working on the Boundary Layer Transition, or BOLT, flight experiment.

The aim of the BOLT experiment is to predict the state of the boundary layer, or the thin layer of air near the surface, of a new canonical geometry that has concave surfaces and swept leading edges. According to APL, the ability to predict when the air transitions from moving in a smooth line across the vehicle surface to becoming turbulent and swirling around it will help determine the heating to bodies moving at hypersonic speeds. Determining where boundary layer transition occurs also helps to plan better for aerodynamic drag.

The Air Force Research Laboratory and Air Force Office of Scientific Research awarded a research grant to JHU-APL to conduct the BOLT experiments in order to progress the understanding of boundary layer transition physics. The BOLT flight experiment is a multi-organizational effort that includes research groups from academic, commercial and government institutions across the nation and German Aerospace Center in Germany. It has also trained graduate students from across the country.

"BOLT is changing the paradigm on how we involve students and academia in flight experiments, working side-by-side with university-affiliated research centers, (government) labs and industry," said Dr. Ivett Leyva, from Air Force Research Laboratory and Air Force Office of Scientific Research.

To conduct the experiment on a more complex geometry, the BOLT shape was developed. The shape features a cylindrical nose tip followed by four symmetric highly-swept leading edges and two symmetric upper and lower concave surfaces. It also features side "gutter" surfaces which isolate flow between the independent surfaces and leading edges.

While the JHU-APL instrumentation selection was driven by the understanding of physics gained with ground testing and analysis, the goal of the BOLT experiment is to gather high-quality measurements at actual hypersonic flight conditions with a sounding rocket system.

JHU-APL staff member Dr. Brad Wheaton, who is the principal investigator for BOLT, approached Tunnel 9, located less than 15 miles from JHU-APL, to provide training for the installation of Medtherm coaxial thermocouple sensors on the BOLT experimental payload. This instrumentation is used to measure temperatures during the flight experiment.

"Tunnel 9's staff and technicians have tremendous experience with these Medtherm sensors in particular, and we wanted to make sure we learned from Tunnel 9 about how the facility installs these sensors successfully on their wind tunnel models," Wheaton said. "We've utilized T9 staff as a resource to ensure that we are following best practices with these unique instruments."

An in-person training session was arranged. In advance of this meeting, Tunnel 9 staff sent several training videos to JHU-APL.

Onsite training, which focused on procedures and direction for installing the coaxial thermocouples in the BOLT hardware, occurred at Tunnel 9 in May.

"We brought a replica piece of our flight hardware so that the T9 staff could understand some of the unique challenges we face to installing these sensors on the BOLT geometry, particularly in the highly-swept leading edge regions," Wheaton said. "We figured that T9, having instrumented so many different geometries, has probably seen it all."

Wheaton and two other JHU-APL staff members involved in the sensor installation attended the training session led by Tunnel 9 Engineering technician Dave Eisentraut.

"Dave Eisentraut has numerous years of experience in working with and installing instrumentation in wind tunnel models, including coaxial thermocouples," said Tunnel 9 Project engineer George Moraru, who was involved in coordinating the training and providing some technical assistance. "He advised JHU-APL employees on our installation methodologies and provided guidance based on his extensive knowledge of instrumentation installation."

In addition, Tunnel 9 Technical Director John Lafferty and other Tunnel 9 staff have attended BOLT design reviews and provided feedback on the design of the flight experiment hardware.

"As we nationally prepare to fly hypersonically more, efforts like this highlight the special skills the Air Force Test Center has across our enterprise and that we are capable and expected to contribute much more than air-on hours," said Tunnel 9 Site Director Dan Marren. "This is a great example of leveraging our skills we utilize every day to reduce risk to the nation's program in hypersonics."

Moraru said both JHU-APL and AFRL and AFOSR expressed appreciation to Tunnel 9 staffers for their help.

"After the BOLT flight, we look forward to hearing how the training assisted in acquiring critical flight data," he said.

Related Links
US Air Force Research Laboratory
Rocket Science News at Space-Travel.Com

Thanks for being there;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Monthly Supporter
$5+ Billed Monthly

paypal only
SpaceDaily Contributor
$5 Billed Once

credit card or paypal

Engine Section for NASA's SLS Rocket Moved for Final Integration
New Orleans LA (SPX) Sep 05, 2019
Technicians at NASA's Michoud Assembly Facility in New Orleans moved the engine section for NASA's Space Launch System (SLS) rocket to another part of the facility on Sept. 3 to prepare it for joining to the rest of the rocket's core stage. The engine section, which comprises the lowest portion of the 212-foot-tall stage, is the last major component to be horizontally integrated to the core stage. The flight hardware will be used for Artemis I, the first lunar mission of SLS and NASA's Orion ... read more

Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

Putin briefed on results of probe into hole in Soyuz MS-09

France pledges billions in fight to halt start-up drain

Russia mulls equipping cutting-edge cosmonaut emergency survival kit with firearm

Innovative model created for NASA to predict vitamin levels in spaceflight food

Baikonur Cosmodrome Getting Ready for Last Launch of Russian Rocket With Ukrainian Parts

China to launch Third Long March 5 by year end

Roscosmos to Build Cheap Soyuz-2M Rocket for Commercial Satellites Launch Service

Engine Section for NASA's SLS Rocket Moved for Final Integration

Carbon Dioxide Conversion Challenge could help human explorers live on Mars

Mars 2020 Spacecraft Comes Full Circle

NASA Research Gives New Insight into How Much Atmosphere Mars Lost

'Martian CSI' Sheds Light on How Asteroid Impacts Generated Running Water Under Red Planet

China's KZ-1A rocket launches two satellites

China's newly launched communication satellite suffers abnormality

China launches first private rocket capable of carrying satellites

Chinese scientists say goodbye to Tiangong-2

First launch of UK's OneWeb satellites from Baikonur planned for Dec 19

Iridium and OneWeb to collaborate on a global satellite services offering

Winning bootcamp ideas at Phi-week

Private Chinese firms tapping international space market

L3Harris awarded nearly $12.8M for Eglin AN/FPS-85 radar work

US Space Module Genesis II Might Crash into Relict Russian Satellite

Mining industry seeks to polish tarnished reputation

Spider silk, wood combination replicates material advantages of plastic

Researchers mix RNA and DNA to study how life's process began billions of years ago

Research redefines lower limit for planet size habitability

First water detected on potentially 'habitable' planet

Water detected on an exoplanet located in its star's habitable zone

Storms on Jupiter are disturbing the planet's colorful belts

ALMA shows what's inside Jupiter's storms

Young Jupiter was smacked head-on by massive newborn planet

Mission to Jupiter's icy moon confirmed

The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us.