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New Findings from Japan Aerospace Exploration Agency Describe Advances in Propulsion and Power (Experimental Investigation of an Alternative Rocket...

August 13, 2014



New Findings from Japan Aerospace Exploration Agency Describe Advances in Propulsion and Power (Experimental Investigation of an Alternative Rocket Configuration for Rocket-Based Combined Cycle Engines)

By a News Reporter-Staff News Editor at Defense & Aerospace Week -- Investigators publish new report on Propulsion and Power. According to news reporting out of Miyagi, Japan, by VerticalNews editors, research stated, "Experimental tests are conducted to evaluate two rocket exhaust configurations within an Rocket-Based Combined Cycle engine model. Each configuration uses a single rocket chamber but expands the rocket exhaust to a different geometry."

Our news journalists obtained a quote from the research from Japan Aerospace Exploration Agency, "One configuration uses two traditional circular rocket nozzles whereas the other uses two annular exhaust geometries based on the Exchange Inlet design. Wall pressure data are collected along the length of each configuration to evaluate the air entrainment. The annular configuration is shown to increase the entrainment ratio by as much as 28% over the traditional circular rocket design. The annular configuration is also shown to choke the incoming airflow at a lower rocket chamber pressure more uniformly across the engine cross section."

According to the news editors, the research concluded: "Total pressure measurements are also obtained at the engine exit plane, which show that the annular configuration yields an average Mach number 57% higher than the circular configuration under conditions close to those for maximum air entrainment."

For more information on this research see: Experimental Investigation of an Alternative Rocket Configuration for Rocket-Based Combined Cycle Engines. Journal of Propulsion and Power, 2014;30(4):944-951. Journal of Propulsion and Power can be contacted at: Amer Inst Aeronautics Astronautics, 1801 Alexander Bell Drive, Ste 500, Reston, VA 22091-4344, USA.

Our news journalists report that additional information may be obtained by contacting J. Etele, Japan Aerosp Explorat Agcy, Space Transportat Mission Directorate, Adv Prop Technol Res Grp, Kakuda, Miyagi 9811525, Japan. Additional authors for this research include S. Hasegawa and S. Ueda.

Keywords for this news article include: Asia, Japan, Miyagi, Propulsion and Power

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Defense & Aerospace Week


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