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Effect of Operating Frequency and Fill Time on PDE-Ejector Thrust PerformanceThrust measurements for a pulse detonation engine (PDE)-ejector system were determined for a range of operating frequencies. Various length tubular ejectors were utilized. The results were compared to the measurements of the thrust output of the PDE alone to determine the enhancement provided by each ejector configuration at the specified frequencies. Ethylene was chosen as the fuel, with an equi-molar mixture of nitrogen and oxygen acting as the oxidizer. The propellant was kept at an equivalence ratio of one during all the experiments. The system was operated for frequencies between 20 and 50 Hz. The parameter space of the study included PDE operation frequency, ejector length, overlap percentage, the radius of curvature for the ejector inlets, and duration of the time allowed between cycles. The results of the experiments showed a maximum thrust augmentation of 120% for a PDE-ejector configuration at a frequency of 40Hz with a fill time of 10 ms.
Document ID
20050239576
Acquisition Source
Headquarters
Document Type
Other
Authors
Landry, K.
(Pennsylvania State Univ. University Park, PA, United States)
Santoro, Robert J.
(Pennsylvania State Univ. University Park, PA, United States)
Pal, Sibtosh
(Pennsylvania State Univ. University Park, PA, United States)
Shehadeh, R.
Bouvet, N.
Lee, S.-Y.
Date Acquired
August 23, 2013
Publication Date
November 1, 2005
Publication Information
Publication: Appendix A. Publications and Presenation Abstracts
Subject Category
Propellants And Fuels
Meeting Information
Meeting: Chemical and Physical Processes in Combustion, 2005 Technical Meeting of the Eastern States Section of the Combustion Institute
Location: PA
Country: United States
Start Date: November 13, 2005
End Date: November 15, 2005
Funding Number(s)
CONTRACT_GRANT: NAG3-2657
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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