Three-dimensional numerical study on influences of uneven equivalence ratio on performances of a rotating detonation combustor

被引：0
|
作者：
Liu S. [1 ,2 ]
Gao C. [1 ,2 ]
Zhou S. [3 ]
机构：
[1] China Electronic Product Reliability and Environmental Testing Research Institute, Guangdong, Guangzhou
[2] Guangdong Provincial Key Laboratory of Electronic Information Products Reliability Technology, Guangdong, Guangzhou
[3] College of Aerospace Engineering, Chongqing University, Chongqing
来源：
Baozha Yu Chongji/Explosion and Shock Waves | 2024年 / 44卷 / 05期
关键词：
pressure-gain effect; rotating detonation combustor; temperature rise effect; unevenness equivalence ratio; user-defined function;
D O I：
10.11883/bzycj-2023-0220
中图分类号：
学科分类号：
摘要：
To investigate the effects of the inlet equivalence ratio distribution on the performance of a rotating detonation combustor (RDC), the radial or circumferential function model of equivalence ratio at the entrance of the RDC was established. The distribution function of component mass fraction in radial or circumferential direction was obtained by substituting the function model of equivalence ratio into the function of component mass fraction and equivalence ratio. The distribution function of entry boundary components was constructed by the user-defined function tool in the Fluent code. A three-dimensional transient Euler equation was employed to simulate the propagation process and flow field characteristics of detonation waves in a C10H22/air RDC, and the characteristics parameters of the detonation waves and RDC were compared under different equivalence-ratio distributions. The results show that the uneven distribution of the inlet equivalence ratio will affect the characteristics of the detonation waves. When the equivalence ratio ranges from 0.4 to 1.6 and is not uniformly distributed along the radial direction, the height of the detonation wave decreases with the increase of equivalence ratio at the midline of the inlet surface. When the equivalence ratio ranges from 0.4 to 1.6 and the distribution is non-uniform in the circumferential direction, the height of the detonation wave is almost not affected with the increase of the number of changing periods. The uneven distribution of equivalence ratio will weaken the pressure-gain effect and temperature rise effect of the RDC, and the influence of the uneven distribution of equivalence ratio along the radial direction is more obvious than that along the circumferential direction. In the RDC, the induction and reactant region of detonation wave is not strictly behind the leading shock wave, but is located at the oblique rear of the leading shock wave, and under the influence of curvature, the leading shock wave propagates along the circumference of the middle diameter cylinder near the outer wall of the RDC. © 2024 Explosion and Shock Waves. All rights reserved.
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共 23 条
  • [1] WANG B, XIE Q F, WEN H C, Et al., Research progress of detonation engines [J], Journal of Propulsion Technology, 42, 4, pp. 721-737, (2021)
  • [2] QIN Y X., New development progress of rotating detonation engine [J], Aerospace Power, 3, pp. 16-19, (2022)
  • [3] ANAND V, GEORGE A S, DRISCOLL R, Et al., Analysis of air inlet and fuel plenum behavior in a rotating detonation combustor [J], Experimental Thermal and Fluid Science, 70, pp. 408-416, (2016)
  • [4] GEORGE A S, RANDALL S, ANAND V, Et al., Characterization of initiator dynamics in a rotating detonation combustor [J], Experimental Thermal and Fluid Science, 72, pp. 171-181, (2016)
  • [5] BURKE R, REZZAG T, DUNN I, Et al., The effect of premixed stratification on the wave dynamics of a rotating detonation combustor [J], International Journal of Hydrogen Energy, 46, 54, pp. 27816-27826, (2021)
  • [6] NAIR A P, LEE D D, PINEDA D I, Et al., Methane-oxygen rotating detonation exhaust thermodynamics with variable mixing, equivalence ratio, and mass flux, Aerospace Science and Technology, 113, (2021)
  • [7] SALVADORI M, TUDISCO P, RANJAN D, Et al., Numerical investigation of mass flow rate effects on multiplicity of detonation waves within a H<sub>2</sub>/air rotating detonation combustor [J], International Journal of Hydrogen Energy, 47, 6, pp. 4155-4170, (2022)
  • [8] MIKHALCHENKO E V, NIKITIN V F, PHYLIPPOV Y G, Et al., Numerical study of rotating detonation onset in engines [J], Shock Waves, 31, 7, pp. 763-776, (2021)
  • [9] JIANG H Y, HUANG Y., Numerical investigation of non-premixed H<sub>2</sub>-air rotating detonation combustor with different equivalence ratios, Journal of Physics: Conference Series, 2235, (2022)
  • [10] WANG S L, WU Y, JIN D, Et al., Effects of nozzles on performance of rotating detonation at different equivalence ratios, Explosion and Shock Waves, 40, 10, (2020)
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