Investigation of the structure of detonation waves in a non-premixed hydrogen–air rotating detonation engine using mid-infrared imaging

2019 ◽  
Vol 37 (3) ◽  
pp. 3479-3486 ◽  
Author(s):  
Brent A. Rankin ◽  
Joshua R. Codoni ◽  
Kevin Y. Cho ◽  
John L. Hoke ◽  
Frederick R. Schauer
Keyword(s):  
Infrared Imaging ◽  
Detonation Waves ◽  
Mid Infrared ◽  
Rotating Detonation Engine ◽  
Detonation Engine ◽  
Rotating Detonation

Critical condition of inner cylinder radius for sustaining rotating detonation waves in rotating detonation engine thruster

2019 ◽  
Vol 37 (3) ◽  
pp. 3461-3469 ◽  
Author(s):  
Akira Kawasaki ◽  
Tomoya Inakawa ◽  
Jiro Kasahara ◽  
Keisuke Goto ◽  
Ken Matsuoka ◽  
...  
Keyword(s):  
Critical Condition ◽  
Detonation Waves ◽  
Cylinder Radius ◽  
Rotating Detonation Engine ◽  
Detonation Engine ◽  
Rotating Detonation

Evidence of Carbon Driven Detonation Waves within a Rotating Detonation Engine

2021 ◽  
Author(s):  
Ian B. Dunn ◽  
Vidhan Malik ◽  
Kareem A. Ahmed ◽  
Marc Salvadori ◽  
Suresh Menon
Keyword(s):  
Detonation Waves ◽  
Rotating Detonation Engine ◽  
Detonation Engine ◽  
Rotating Detonation

scholarly journals Experimental Investigation of Detonation Propagation Modes and Thrust Performance in a Small Rotating Detonation Engine Using C2H4/O2 Propellant

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1381
Author(s):  
Hyung-Seok Han ◽  
Eun Sung Lee ◽  
Jeong-Yeol Choi
Keyword(s):  
Experimental Investigation ◽  
Detonation Waves ◽  
Mixing Efficiency ◽  
Stable Operation ◽  
Characteristic Velocity ◽  
Detonation Propagation ◽  
Rotating Detonation Engine ◽  
Detonation Engine ◽  
Rotating Detonation ◽  
Thrust Performance

A small rotating detonation engine (RDE) model and the corresponding experimental setup were constructed for the experimental investigation of the detonation propagation characteristics and thrust performance of a circular RDE. Experiments were conducted at a range of 0.3–2.5 equivalence ratio with a total mass flow rate of less than 180.0 g/s using a C2H4/O2 mixture. Irregularly unstable detonative combustion occurs immediately after the detonation initiation, which includes initiation, propagation, decaying, and the merging of detonation waves. Following this, periodically unsteady detonative combustion occurs in the circular channel, resulting in the stable operation of the RDE. During stable operation, two detonation waves are predominant, rotating along the wall at a speed lower than the Chapman–Jouguet (CJ) detonation speed. The characteristic velocity efficiency is approximately 73% on average. The low characteristic velocity efficiency is presumed to be caused by the unoptimized combustion channel and the poor mixing efficiency owing to the two-dimensional injector configuration. The effect of the RDE component design and the RDE flow field characteristics need to be further investigated for improving the performance of the RDE.

Experimental and theoretical analysis of carbon driven detonation waves in a heterogeneously premixed Rotating Detonation Engine

Fuel ◽  
2021 ◽  
Vol 302 ◽  
pp. 121128
Author(s):  
Ian B. Dunn ◽  
Vidhan Malik ◽  
Wilmer Flores ◽  
Anthony Morales ◽  
Kareem A. Ahmed
Keyword(s):  
Theoretical Analysis ◽  
Detonation Waves ◽  
Rotating Detonation Engine ◽  
Detonation Engine ◽  
Rotating Detonation

scholarly journals Numerical Study of Detonation Processes in Rotating Detonation Engine and its Propulsive Performance

2020 ◽  
Vol 2020 (3) ◽  
pp. 30-48
Author(s):  
Tae-Hyeong Yi ◽  
Jing Lou ◽  
Cary Kenny Turangan ◽  
Piotr Wolanski
Keyword(s):  
Numerical Study ◽  
Specific Impulse ◽  
Three Dimensional ◽  
Detonation Waves ◽  
Pulse Detonation ◽  
Propulsive Performance ◽  
Rotating Detonation Engine ◽  
Detonation Engine ◽  
Rectangular Chamber ◽  
Rotating Detonation

AbstractNumerical studies on detonation wave propagation in rotating detonation engine and its propulsive performance with one- and multi-step chemistries of a hydrogen-based mixture are presented. The computational codes were developed based on the three-dimensional Euler equations coupled with source terms that incorporate high-temperature chemical reactions. The governing equations were discretized using Roe scheme-based finite volume method for spatial terms and second-order Runge-Kutta method for temporal terms. One-dimensional detonation simulations with one- and multi-step chemistries of a hydrogen-air mixture were performed to verify the computational codes and chemical mechanisms. In two-dimensional simulations, detonation waves rotating in a rectangular chamber were investigated to understand its flowfield characteristics, where the detailed flowfield structure observed in the experiments was successfully captured. Three-dimensional simulations of two-waved rotating detonation engine with an annular chamber were performed to evaluate its propulsive performance in the form of thrust and specific impulse. It was shown that rotating detonation engine produced constant thrust after the flowfield in the chamber was stabilized, which is a major difference from pulse detonation engine that generates repetitive and intermittent thrust.

Numerical Modeling of the RDE

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Michal Folusiak ◽  
Karol Swiderski ◽  
Piotr Wolański
Keyword(s):  
Combustion Chamber ◽  
Turbine Engine ◽  
Rotating Detonation Engine ◽  
University Of Technology ◽  
Detonation Combustion ◽  
Detonation Engine ◽  
Innovative Economy ◽  
Turboshaft Engine ◽  
The University ◽  
Rotating Detonation

AbstractThe idea of using the phenomenon of rotating detonation to propulsion has its roots in fifties of the last century in works of Adamson et al. and Nicholls et al. at the University of Michigan. The idea was recently reinvented and experimental research and numerical simulations on the Rotating Detonation Engine (RDE) are carried in numerous institutions worldwide, in Poland at Warsaw University of Technology (WUT) since 2004. Over the period 2010-2014 WUT and Institute of Aviation (IOA) jointly implemented the project under the Innovative Economy Operational Programme entitled ‘Turbine engine with detonation combustion chamber’. The goal of the project was to replace the combustion chamber of turboshaft engine GTD-350 with the annular detonation chamber.This paper is focused on investigation of the influence of a geometry and flow conditions on the structure and propagation stability of the rotating detonation wave. Presented results are in majority an outcome of the aforementioned programme, in particular authors’ works on the development of the in-house code REFLOPS USG and its application to simulation of the rotating detonation propagation in the RDE.

Propulsive Performane of Cylindrical Rotating Detonation Engine with Propellant Injection Cooing

2021 ◽  
Author(s):  
Keisuke Goto ◽  
Kosei Ota ◽  
Akira Kawasaki ◽  
Hiroaki Watanabe ◽  
Nobotu Itouyama ◽  
...  
Keyword(s):  
Rotating Detonation Engine ◽  
Detonation Engine ◽  
Rotating Detonation
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