Shape effect of cavity flameholder on mixing zone of hydrogen jet at supersonic flow

被引：178

作者：

Moradi, Rasoul ^{[1
]}

Mahyari, A. ^{[2
]}

Gerdroodbary, M. Barzegar ^{[3
]}

Abdollahi, A. ^{[4
]}

Amini, Younes ^{[5
]}

机构：

[1] Khazar Univ, Sch Engn & Appl Sci, Dept Chem Engn, Baku, Azerbaijan

[2] Sharif Univ Technol, Dept Chem & Petr Engn, Tehran, Iran

[3] Babol Noshirvani Univ Technol, Dept Mech Engn, Babol Sar, Iran

[4] Islamic Azad Univ, Dept Mech Engn, Najafabad Branch, Najafabad, Iran

[5] Isfahan Univ Technol, Dept Chem Engn, Esfahan, Iran

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2018年 / 43卷 / 33期

关键词：

Computational fluid dynamics; Mixing efficiency; Scramjets; Hydrogen mixing; Cavity flameholder; MICRO AIR-JETS; SCRAMJET COMBUSTOR; TRANSVERSE JET; INJECTOR CONFIGURATION; COUNTERFLOWING JET; HEAT-TRANSFER; NOSE CONE; FUEL; AUGMENTATION; PERFORMANCE;

D O I：

10.1016/j.ijhydene.2018.06.166

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cavity flameholder is known as an efficient technique for providing the ignition zone. In this research, computational fluid dynamic is applied to study the influence of the various shapes of cavity as flameholder on the mixing efficiency inside the scramjet. To evaluate different shapes of cavity flame holder, the Reynolds-averaged Navier-Stokes equations with (SST) turbulence model are solved to reveal the effect of significant parameters. The influence of trapezoidal, circle and rectangular cavity on fuel distribution is expansively analyzed. Moreover, the influence of various Mach numbers (M = 1.2, 2 and 3) on mixing rate and flow feature inside the cavity is examined. The comprehensive parametric studies are also done. Our findings show that the trapezoidal cavity is more efficient than other shapes in the preservation of the ignition zone within the cavity. In addition, the increase of free stream Mach number intensifies the main circulations within cavity and this induces a stable ignition zone within cavity. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：16364 / 16372

页数：9

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