Numerical study of hollow rotating detonation engine with different fuel injection area ratios

Propagation Mode Analysis on H2–Air Rotating Detonation Waves in a Hollow Combustor

“…On the contrary, experimental observation demonstrated a shift from the dual-wave mode to the single-wave mode in H 2 -air propellant [14], which are two distinct mechanisms relating to the formation of RDWs in an HCC under atmospheric ambient pressure with different injection conditions [15,16]. Moreover, the Laval nozzle with optional contraction ratios [17], hydrocarbon fuel [14,17], and contrasting injection area ratio [4,13] make the stability of RDW more diverse and complicated. As for the thrust performance, simulation results reported that the absence of the inner wall does not hinder the thrust performance of RDEs [18].…”

“…Introduction I N RECENT years, rotating detonation waves (RDWs) in hollow combustion chambers (HCCs) have received much attention due to their potential application to power rotating detonation engine (RDEs) that rivals rocket propulsion [1,2] or airbreathing propulsion engines [3]. Compared with a typical annular combustion chamber configuration, this HCC configuration is believed to effectively reduce the cooling requirements of the combustion chamber [4] or broaden the equivalent ratio limit of propellant [5]. However, achieving stable propagation of detonation and controlling its propagation behavior are the prerequisites to realize the RDE performance with an HCC.…”

“…Because it determines the initial conditions before detonation and the engine's thrust performance, and more applied basic research that considers real working conditions needs to be carried out to understand more accurate thrust performance in experiments or simulations. In this study, based on our previous work on CH 4 -O 2 -fueled RDWs in an HCC [14], the detailed propagation mode of H 2 -air-fueled RDWs under the same configuration is experimentally investigated. Moreover, the propellant mass flow effect is involved.…”

Propulsive Performance and Heating Environment of Rotating Detonation Engine with Various Nozzles

“…The propulsive performance of RDE and PDE have been widely investigated by many institutions [6,7,9,[12][13][14][15][16][17][18][19][20][21][22][23]29,30]. Kindracki et al [12] measured the thrust and specific impulse of RDE under 0.5 bar.…”

“…The effects of RDE inner-wall radius were investigated numerically and experientially. A numerical simulation by Yao et al [15] showed the flow structure of a hollow RDE without an inner-wall cylinder. Kawasaki et al [16] investigated the effect of RDE inner radius, including a hollow RDE, on propulsive performance and the propagation structure of the detonation wave and proposed the critical inner diameter for sustaining thrust performance.…”