Tech

June 20, 2014

NASA Aeronautics makes strides to bring back supersonic passenger travel

NASA F/A-18 mission support aircraft were used to create low-intensity sonic booms during a resaerch project at the agency’s Armstrong Flight Research Center in Edwards, California. The Waveforms and Sonic boom Perception and Response, or WSPR, project gathered data from a select group of more than 100 volunteer Edwards Air Force Base residents on their individual attitudes toward sonic booms produced by aircraft in supersonic flight over Edwards.

The return of supersonic passenger travel may be coming closer to reality thanks to NASA’s efforts to define a new standard for low sonic booms.

Several NASA aeronautics researchers will present their work in Atlanta this week at Aviation 2014, an annual event of the American Institute of Aeronautics and Astronautics. They will share with the global aviation community the progress they are making in overcoming some of the biggest hurdles to supersonic passenger travel.

The research generates data crucial for developing a low-boom standard for the civil aviation industry. NASA works closely with the Federal Aviation Administration and the international aerospace community, including the International Civil Aviation Organization, to gather data and develop new procedures and requirements that may help in a reconsideration of the current ban on supersonic flight over land.

“Lessening sonic booms – shock waves caused by an aircraft flying faster than the speed of sound – is the most significant hurdle to reintroducing commercial supersonic flight,” said Peter Coen, head of the High Speed Project in NASA’s Aeronautics Research Mission Directorate at the agency’s Headquarters in Washington. “Other barriers include high altitude emissions, fuel efficiency and community noise around airports.”

Engineers at NASA centers in California, Ohio and Virginia that conduct aviation research are tackling sonic booms from a number of angles, including how to design a low-boom aircraft and characterize the noise. NASA researchers have studied how to quantify the loudness and annoyance of the boom by asking people to listen to the sounds in a specially designed noise test chamber.

A recent flight research campaign at NASA’s Armstrong Flight Research Center in Edwards, California, had residents explore ways to assess the public’s response to sonic booms in a real-world setting. Researchers at Armstrong have an advantage – pilots are permitted to fly at supersonic speeds because the facility is located on Edwards Air Force Base.

“People here are more familiar with sonic booms,” said Armstrong aerospace engineer Larry Cliatt. “Eventually, we want to take this to a broader level of people who have never heard a sonic boom.”

Similar work is conducted at NASA’s Langley Research Center in Hampton, Virginia, where volunteers from the local community rated sonic booms according to how disruptive they determined the sound to be.

“They each listened to a total of 140 sounds, and based on their average response, we can begin to estimate the general public’s reactions,” explained Langley acoustics engineer Alexandra Loubeau.

She also conducted a study at Langley comparing results from tools used to predict sonic boom noise at ground-level.

“Because of the interaction with the atmosphere, it is important to be as consistent as possible in the implementation and usage of these tools. The comparisons done so far have shown good agreement, but there are some inconsistencies that need to be studied,” Loubeau said.

Other studies are focused on predicting the sonic boom and on design approaches to reducing it. Participants from Japan, the United States and France attended the first Sonic Boom Prediction Workshop, where they evaluated simple configurations – cylindrical bodies with and without wings – and complex full aircraft designs.

“We are working to understand the worldwide state of the art in predicting sonic booms from an aircraft point of view,” said Mike Park, a fluid mechanics engineer at Langley. “We found for simple configurations we can analyze and predict sonic booms extremely well. For complex configurations we still have some work to do.”

Wind tunnels are another tool used to help predict which airplane designs might have quieter booms. The most recent tests were conducted at NASA’s Ames Research Center in Moffett Field, Calif., and Glenn Research Center in Cleveland.  Similar to designs of the past, current aircraft designs being tested are characterized by a needle-like nose, a sleek fuselage and a delta wing or highly-swept wings – shapes that result in much lower booms.

NASA and industry engineers say they believe supersonic research has progressed to the point where the design of a practical low-boom supersonic jet is within reach.




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


 
 

 

Headlines December 17, 2014

News: U.S. Air Force tanker platform slated for year-end debut - Boeing is planning for first flight of its 767-2C – upon which the U.S. Air Force’s new KC-46 tanker will be based – by year’s end, six months late. Northrop Grumman wins $657.4 million deal to supply drones to South Korea - Northrop Grumman has won...
 
 

NASA launches new Micro-g NExT for undergraduates

NASA is offering undergraduate students an opportunity to participate in a new microgravity activity called Micro-g Neutral Buoyancy Experiment Design Teams. The deadline for proposals is Jan. 28, 2015. Micro-g NExT challenges students to work in teams to design and build prototypes of spacewalking tools to be used by astronauts for spacewalk training in the...
 
 
launch1

Storm fails to quench liftoff of secret reconnaissance satellite

The fiery launch of an Atlas V (541), among the most powerful of the venerable Atlas family, briefly dispelled the gloom over Californiaís Central Coast on the evening of Dec. 12. A team of personnel from United Launch Allianc...
 

 
Coast Guard photograph

Navy demonstrates unmanned helicopter operations aboard Coast Guard cutter

http://static.dvidshub.net/media/video/1412/DOD_102145893/DOD_102145893-512×288-442k.mp4 Coast Guard photograph An MQ-8B Fire Scout UAS is tested off the Coast Guard Cutter Bertholf near Los Angeles, Dec. 5 2014. The Coast...
 
 
GPS-OCX

GPS III, OCX successfully demonstrate key satellite command, control capabilities

Lockheed Martin and Raytheon successfully completed the fourth of five planned launch and early orbit exercises to demonstrate new automation capabilities, information assurance and launch readiness of the worldís most powerfu...
 
 

Aerojet Rocketdyne successfully demonstrates 3D printed rocket propulsion system for satellites

Aerojet Rocketdyne has successfully completed a hot-fire test of its MPS-120 CubeSat High-Impulse Adaptable Modular Propulsion System. The MPS-120 is the first 3D-printed hydrazine integrated propulsion system and is designed to provide propulsion for CubeSats, enabling missions not previously available to these tiny satellites. The project was funded out of the NASA Office of Chief...
 




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>