Laser-based fuel diagnostics for sensing and control in pulse detonation engines

2002 ◽  
Author(s):  
L. Ma ◽  
S. Sanders ◽  
J. Jeffries ◽  
R. Hanson
Keyword(s):  
Pulse Detonation Engines ◽  
Pulse Detonation ◽  
And Control

Influence of Geometry on Starting Vortex and Ejector Performance

2011 ◽  
Vol 133 (5) ◽  
Author(s):  
Fei Zheng ◽  
Andrey V. Kuznetsov ◽  
William L. Roberts ◽  
Daniel E. Paxson
Keyword(s):  
Relative Position ◽  
Navier Stokes ◽  
Propulsion Systems ◽  
Fundamental Interest ◽  
Pulse Detonation Engines ◽  
Pulse Detonation ◽  
Pulsed Jet ◽  
Overall Performance ◽  
And Control ◽  
Driving Source

For many propulsion devices, the thrust may be augmented considerably by adding a passive ejector, and these devices are especially attractive for unsteady propulsion systems such as pulse detonation engines and pulsejets. Starting vortices from these unsteady devices dominate the flowfield and control to a great extent the level of the thrust augmentation. Therefore, it is of fundamental interest to understand the geometric influences on the starting vortex and how these manifest themselves in augmenter/ejector performance. An unsteady Reynolds averaged Navier–Stokes calculation was used to study the physics of a starting vortex generated at the exit of a pulsed jet and its interaction with an ejector. A 50 cm long pulsejet (typical hobby scale, allowing comparison with experimental data) with a circular exit was modeled as the resonant driving source and used to suggest an optimal ejector geometry and relative position. Computed limit-cycle thrust augmentation values compared favorably to experimentally obtained values for the same ejector geometries. Results suggest that the optimal diameter of the ejector is related to its relative position, dictated by the trajectory of the vortex toroid. The effect of the length of the ejector (which determines the natural frequency of the ejector, related to the acoustic processes occurring in the ejector) on overall performance was also investigated and shown to be less important than the ejector diameter.

Experimental investigations of momentum and heat transfer in pulse detonation engines

2002 ◽  
Vol 29 (2) ◽  
pp. 2847-2854 ◽  
Author(s):  
Jiro Kasahara ◽  
Kouki Takazawa ◽  
Takakage Arai ◽  
Yu Tanahashi ◽  
Shingo Chiba ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Experimental Investigations ◽  
Pulse Detonation Engines ◽  
Pulse Detonation ◽  
Momentum And Heat Transfer

Shock Reflection Detonation Initiation Studies for Pulse Detonation Engines

2005 ◽  
Vol 21 (6) ◽  
pp. 1117-1125 ◽  
Author(s):  
B. de Wit ◽  
G. Ciccarelli ◽  
F. Zhang ◽  
S. Murray
Keyword(s):  
Detonation Initiation ◽  
Shock Reflection ◽  
Pulse Detonation Engines ◽  
Pulse Detonation

Wave Reverberations in Multitube Pulse Detonation Engines

2008 ◽  
Vol 24 (2) ◽  
pp. 345-352 ◽  
Author(s):  
Houshang B. Ebrahimi ◽  
Charles L. Merkle
Keyword(s):  
Pulse Detonation Engines ◽  
Pulse Detonation

Exploratory study on new pulse detonation engines*

2003 ◽  
Vol 13 (2) ◽  
pp. 88-94
Author(s):  
Chuanjun Yan ◽  
Wei Fan ◽  
Xiqiao Huang ◽  
Qun Zhang ◽  
Longxi Zheng
Keyword(s):  
Exploratory Study ◽  
Pulse Detonation Engines ◽  
Pulse Detonation
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