NASA Technical Reports Server (NTRS) : Development pdf

NASA Technical Reports Server (NTRS) : Development

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In pulse detonation engines, the potential exists for gas pulses from the combustor to travel upstream and adversely affect the inlet performance of the engine. In order to determine the effect of these high frequency pulses on the inlet performance, an air pulsation valve was developed to provide air pulses downstream of a supersonic parametric inlet test section. The purpose of this report is to document the design and characterization tests that were performed on a pulsation valve that was tested at the NASA Glenn Research Center 1×1 Supersonic Wind Tunnel (SWT) test facility. The high air flow pulsation valve design philosophy and analyses performed are discussed and characterization test results are presented. The pulsation valve model was devised based on the concept of using a free spinning ball valve driven from a variable speed electric motor to generate air flow pulses at preset frequencies. In order to deliver the proper flow rate, the flow port was contoured to maximize flow rate and minimize pressure drop.

To obtain sharp pressure spikes the valve flow port was designed to be as narrow as possible to minimize port dwell time

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 10/1/2005
• Year: 2005
• Book Topics/Themes: NASA Technical Reports Server (NTRS), AIR FLOW, CHARACTERIZATION, ENGINE INLETS, PULSE DETONATION ENGINES, SUPERSONIC WIND TUNNELS, GAS VALVES, WIND TUNNEL TESTS, COMBUSTION CHAMBERS, ELECTRIC MOTORS, FLOW VELOCITY, SIMULATION, STRUTS, SEALS (STOPPERS), SHAFTS (MACHINE ELEMENTS), BALL BEARINGS, FATIGUE TESTS, STRESS MEASUREMENT, Tornabene, Robert

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