新型湍流定容燃烧弹湍流场数值分析

秦思雨,张欣,王跃

车用发动机 ›› 2019, Vol. 0 ›› Issue (6) : 15-21.

车用发动机 ›› 2019, Vol. 0 ›› Issue (6) : 15-21.
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新型湍流定容燃烧弹湍流场数值分析

  • 秦思雨,张欣,王跃
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Numerical Simulation of Turbulent Flow Field inside Turbulent Constant Volume Combustion Bomb

  • QIN Siyu,ZHANG Xin,WANG Yue
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摘要

根据湍流发生机理,设计了一种新型的定容燃烧弹内湍流发生系统,用于在定容燃烧弹内部产生可调控的各向均匀对称湍流环境。基于Fluent软件建立了湍流定容燃烧弹内部流动的数值模拟模型,在此基础上,对湍流定容燃烧弹内部流动进行了数值模拟,得到了固定参数情况下容弹内部流场的分布特点。对湍流定容燃烧弹内部流场的特点进行分析,结果表明该湍流发生系统可在容弹内部产生各向均匀对称湍流环境。运用数值模拟计算了不同电机转速情况下,容弹中心点位置湍流强度在一个循环内的变化规律。最后,将数值模拟的湍流强度计算结果与试验测量的结果进行对比,验证了原有仿真设计的准确性。

Abstract

According to the generation mechanism of turbulent flow, a new type of system that can generate turbulence inside constant volume combustion bomb was designed to build a controllable uniform and symmetrical turbulence environment inside the bomb. Based on the Fluent software, a numerical simulation model of internal flow inside turbulent constant volume combustion bomb was established. The numerical simulation was conducted and the distribution characteristics of internal flow field inside the bomb based on the fixed parameters were acquired. The characteristcs of internal flow field of turbulent constant volume combustion bomb was further analyzed. The results show that the turbulent flow system can generate a uniform and symmetrical turbulence environment inside the bomb. In addition, the change law of turbulent strength within a cycle in the center of bomb is calculated at different speeds of motor by using the simulation. By comparing simulated results with test results, the accuracy of design and simulation is verified.

关键词

湍流 / 定容燃烧弹 / 数值模拟 / 流场分析

Key words

turbulent flow / constant volume combustion bomb / numerical simulation / flow field analysis

引用本文

导出引用
秦思雨,张欣,王跃. 新型湍流定容燃烧弹湍流场数值分析[J]. 车用发动机. 2019, 0(6): 15-21
QIN Siyu,ZHANG Xin,WANG Yue. Numerical Simulation of Turbulent Flow Field inside Turbulent Constant Volume Combustion Bomb[J]. Vehicle Engine. 2019, 0(6): 15-21

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