Bionic Design and Three-Dimensional Numerical Simulation of Engine Intake

doi:10.3969 /j.issn.1674-0696.2013.05.34

Abstract

Abstract: In order to reduce the engine intake duct resistance，a bionic non-smooth structure was proposed on the basis of basic principle of bionics． Computational fluid dynamics method was used to analyze the engine intake duct with bionic nonsmooth surface impacting on the resistance of 170F diesel engine intake． While，the fluent model of 170F diesel engine was developed，which includes engine intake air flow field，boundary conditions and initial conditions，and the turbulence of the inlet gas was described by SST k-ω turbulence model． In order to improve the calculation efficiency，the computational domain was meshed by multi-block grid technique． The simulation results show that the wall resistance of engine intake with dimple non-smooth surface was decreased by about 14． 2%，and the flow coefficient was increased by about 1． 2%．

Key words: engine intake, bionic non-smooth, resistance reduction, numerical simulation

摘要： 基于仿生学的基本原理，提出一种能降低发动机进气喉管阻力的仿生非光滑结构形式，并以170F 柴油机进气道为分析对象，利用计算流体力学方法研究了仿生非光滑进气喉管对发动机进气阻力的影响。建立170F 型柴油机进气道Fluent 分析模型( 发动机进气道内空气流动域、边界条件及初始条件) ，进气道气体的湍流现象采用SST k-ω 模型模拟。为提高计算效率，对计算域进行多块离散。进气道内的空气流动仿真分析结果表明: 在进气道喉管处添加凹坑型非光滑表面后，进气道进气阻力减小14． 2%左右，流通系数提高1． 2%左右。

关键词: 发动机进气道, 仿生非光滑, 减阻, 数值分析

CLC Number:

TK411.3

Wang Guolin，Fu Jing. Bionic Design and Three-Dimensional Numerical Simulation of Engine Intake[J]. Journal of Chongqing Jiaotong University(Natural Science), 2013, 32(5): 1055-1058.

王国林，付晶. 发动机进气道三维数值模拟及仿生设计[J]. 重庆交通大学学报（自然科学版）, 2013, 32(5): 1055-1058.

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