Numerical study on the influence of jet on the stability of oblique detonation waves in confined space

Abstract

In confined spaces, due to various interfering factors, oblique detonation waves inevitably reflect off the walls, resulting in the formation of a Mach stem. When the Mach reflection is excessively strong, it can lead to the instability of the oblique detonation waves. Therefore, it is necessary to study the stability characteristics of the reflected wave system. Based on a simplified combustor-nozzle model, this paper studies the effects of jet injection on the stability of oblique detonation waves in confined space. The results indicate that injecting a jet on the wedge surface reduces the angle of the oblique detonation waves, decreases the intensity of Mach reflection, and enhances the stability of the wave structures. The oblique detonation waves induced by jets of varying pressure exhibit different characteristics. Compared to a hot jet, cold jet can induce a stronger shock wave at the same pressure. Both excessively high or low jet pressure can lead to a reduction in the stability of the wave structures.

Keywords

Oblique detonation wave / Confined space / Mach stem / Jet injection

References

[1] Li C, Kailasanath K, Oran ES (1994) Detonation structures behind oblique shocks. Phys Fluids 6:1600–1611

[2] Teng HH, Zhang YN, Jiang ZL (2014) Numerical investigation on the induction zone structure of the oblique detonation waves. Comput Fluids 95:127–131

[3] Teng HH, Bian, J, Zhou L et al (2021) A numerical investigation of oblique detonation waves in hydrogen-air mixtures at low Mach numbers. Int J Hydrogen Energy 46:10984–10994

[4] Xiang GX, Li HY, Cao RH et al (2020) Study of the features of oblique detonation induced by a finite wedge in hydrogen-air mixtures with varying equivalence ratios. Fuel 264:116854

[5] Teng HH, Niu SZ, Yang PF et al (2023) Dynamic response characteristics of oblique detonation waves in non-uniform inflows. Phys Fluids 8:1–9

[6] Sun J, Yang PF, Tian BL et al (2023) Evolution and control of oblique detonation wave structure in unsteady inflow. AIAA J 61:4808–4820

[7] Qin QY, Liu YD, Yuan MZ et al (2024) Effects of inhomogeneous hydrogen concentration distribution on the morphology of the oblique detonation wave. Int J Hydrogen Energy 61:94–101

[8] Yang PF, Ng HD, Teng HH (2019) Numerical study of wedge-induced oblique detonations in unsteady flow. J Fluid Mech 876:264–287

[9] Wang AF, Bian J, Teng HH (2022) Numerical study on initiation of oblique detonation wave by hot jet. Appl Therm Eng 213:118679

[10] Zhang YC, Xiang GX, Gao X et al (2023) Study on initiation characteristics of oblique detonation induced by hydrogen jets in acetylene-air mixtures. Fuel 350:128787

[11] Zhang YC, Xiang GX, Yu J et al (2023) Accelerated initiation of oblique detonation induced by disturbance in detonative zone. Chin J Aeronaut 36:153

[12] Xiang GX, Zhang YC, Tu QR et al (2023) The initiation characteristics of oblique detonation waves induced by a curved surface. Aerosp Sci Technol 128:107743

[13] Qin QY, Zhang XB (2020) Study on the initiation characteristics of the oblique detonation wave by a co-flow hot jet. Acta Astronaut 177:86–95

[14] Zhang GQ, Li GX, Wang KL (2020) Wave structure of oblique detonation disturbed by an expansion wave from a bended tunnel. Appl Therm Eng 180:115856

[15] Wang KL, Yang PF, Teng HH (2021) Steadiness of wave complex induced by oblique detonation wave reflection before an expansion corner. Aerosp Sci Technol 112:106592

[16] Niu SZ, Yang PF, Yang Y et al (2023) Numerical study of the effect of a sudden change in inflow velocity on the stability of an oblique detonation reflected wave system. Sci Sin Phys Mech Astron 53:164–176

[17] Liu Y, Xiao BG, Wang L et al (2021) Standing stability enhancement method of oblique detonation waves in a confined space and its experimental validation. J Exp Fluid Mech 35:109–116

[18] Xi XC, Niu SZ, Yang PF et al (2024) Dynamic response characteristics of wave systems to wedge control in hydrogen-fueled oblique detonation engines. Acta Aeronaut Astronaut Sin 45:130275

[19] Teng HH, Tian C, Zhang YN et al (2021) Morphology of oblique detonation waves in a stoichiometric hydrogen-air mixture. J. Fluid Mech 913:A1

[20] Sun J, Wang YQ, Tian BL et al (2023) detonationFoam: an open-source solver for simulation of gaseous detonation based on OpenFOAM. Comput Phys Commun 292:108859

[21] Li J, Zhao ZW, Kazakov A et al (2007) A comprehensive kinetic mechanism for CO, CH₂O, and CH₃OH combustion. Int J Chem Kinet 39:109

[22] Wang KL, Teng HH, Yang PF et al (2020) Numerical investigation of flow structures resulting from the interaction between an oblique detonation wave and an upper expansion corner. J Fluid Mech 903:A28

Funding

National Natural Science Foundation of China(52076194)

RIGHTS & PERMISSIONS

The Author(s)