波瓣型燃气/空气混合装置的设计与模拟

推进技术 ›› 2015, Vol. 36 ›› Issue (6): 893-898.

波瓣型燃气/空气混合装置的设计与模拟

孙得川,张梦龙

大连理工大学航空航天学院/工业装备结构分析国家重点实验室，辽宁大连 116024,大连理工大学航空航天学院/工业装备结构分析国家重点实验室，辽宁大连 116024

发布日期:2021-08-15
作者简介:孙得川(1973—)，男，博士，教授，研究领域为火箭发动机，计算流体力学。
基金资助:
航空基金(20120163001)；中央高校基本科研业务费专项资金。

Numerical Simulation and Design of a Lobe Mixer

School of Aeronautics and Astronautics/State Key Laboratory of Structural Analysis for Industrial Equipment，Dalian University of Technology，Dalian 116024，China and School of Aeronautics and Astronautics/State Key Laboratory of Structural Analysis for Industrial Equipment，Dalian University of Technology，Dalian 116024，China

Published:2021-08-15

摘要/Abstract

摘要： 空气涡轮火箭或涡轮基组合冲压发动机中，混合装置对于提高燃烧效率具有重要的作用。为了提高燃气与空气的混合效率，针对波瓣型混合器提出了混合器出口轴向速度一致的原则来指导设计混合器。设计了两种不同类型的波瓣型混合器，并通过数值模拟分析了混合器出口截面形式和中心体端面对混合效率的影响。结果表明:混合器燃气与空气出口截面的面积比是波瓣型混合器设计的关键因素，恰当调整出口面积比使出口速度接近可以明显提高混合效率；中心体截面缩进和凸出会使混合效率降低。

关键词: 波瓣型混合器；空气涡轮火箭；混合效率；数值模拟

Abstract: Mixing device is very important to improve the combustion efficiency in air-turbo-rocket or turbine based combined cycle engine. To increase the mixing efficiency of fuel gas and air，the idea to make the axial velocity of two reactant fluids the same was proposed to direct the design of the lobed mixers. Two types of lobed mixers were designed and the outlet type of the lobe mixer and effect of the central body were analyzed through mixing efficiency by numerical simulation. Numerical analysis shows that the area ratio of gas to air is the key factor for lobe mixer design，a proper area ratio which leads to nearly equal velocity at mixer outlet can improve mixing efficiency apparently. The indentation and protrusion of central body tends to decrease the mixing efficiency in combustor.

Key words: Lobe mixer；Air turbine rocket；Mixing efficiency；Numerical simulation

孙得川,张梦龙. 波瓣型燃气/空气混合装置的设计与模拟[J]. 推进技术, 2015, 36(6): 893-898.

SUN De-chuan,ZHANG Meng-long. Numerical Simulation and Design of a Lobe Mixer[J]. Journal of Propulsion Technology, 2015, 36(6): 893-898.

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