Experimental Study of a High-Frequency Fluidic Valve Fuel Injector

Fuel injectors composed of an ori ce connected to a small plenum cavity were mounted on a detonation tube. These fuel injectors, termed uidic valves, utilize their geometry and a supply pressure to deliver fuel and contain no moving parts. Behavior of these uidic valves is characterized in order to determine their feasibility for integration with high-frequency pulsed or rotating detonation wave engines. Fuel ow is initiated just prior to ignition of the detonation tube to understand the interaction between the uidic valves and the wave. Parametric studies have been conducted with the type of fuel injected, the ori ce diameter, and the plenum cavity pressure. Results indicate that the detonation wave pressure temporarily shuts o the uidic valve supply, but the wave products can be quickly expelled by the fresh fuel supply to allow for refueling. The interruption time of the valve scales with the injection and detonation wave pressure ratios as well as a characteristic time.

[1]  R. Lindsay,et al.  Elements of gasdynamics , 1957 .

[2]  F. A. Bykovskii,et al.  Self-sustaining pulsating detonation of gas-mixture flow , 1996 .

[3]  V. V. Mitrofanov,et al.  Detonation combustion of a gas mixture in a cylindrical chamber , 1980 .

[4]  Sanford Gordon,et al.  Computer program for calculation of complex chemical equilibrium compositions , 1972 .

[5]  S. A. Zhdan.  Mathematical model of continuous detonation in an annular combustor with a supersonic flow velocity , 2008 .

[6]  Kailas Kailasanath,et al.  Numerical investigation of the physics of rotating-detonation-engines , 2011 .

[7]  G. P. Sutton,et al.  Rocket Propulsion Elements Seventh Edition , 2007 .

[8]  Jeong-Yeol Choi,et al.  Propulsive Performance of a Continuously Rotating Detonation Engine , 2011 .

[9]  K. Kailasanath.  Recent developments in the research on pulse detonation engines , 2002 .

[10]  Takuma Endo,et al.  Pressure History at the Thrust Wall of a Simplified Pulse Detonation Engine , 2004 .

[11]  S. A. Zhdan,et al.  Continuous Spin Detonations , 2006 .

[12]  Z. Gut,et al.  Experimental research on the rotating detonation in gaseous fuels–oxygen mixtures , 2011 .

[13]  F. A. Bykovskii.  Thermal fluxes in combustion chamber walls in the detonation and turbulent combustion modes , 1991 .

[14]  P. Wolański,et al.  Fundamentals of rotating detonations , 2009 .

[15]  A. A. Borisov,et al.  Pulse detonation propulsion : challenges, current status, and future perspective , 2004 .