CAJ | 학술논문

基于文丘里原理和层流射流原理设计了一种适用于涡轮增压柴油机的低压废气再循环装置。采用三维仿真CFD软件Fluent对该装置内的空气和EGR气体以及两者所形成的混合气体的流动情况进行了仿真研究，并根据仿真研究的结果对装置的结构参数进行优化。计算结果表明，所设计装置理论上能成功解决增压柴油机中的进排气逆差问题，并且低压EGR系统中的空气喷口进气端面尺寸对系统的EGR率影响较大。
기우문구리원리화층류사류원리설계료일충괄용우와륜증압시유궤적저압폐기재순배장치。채용삼유방진CFD연건Fluent대해장치내적공기화EGR기체이급량자소형성적혼합기체적류동정황진행료방진연구，병근거방진연구적결과대장치적결구삼수진행우화。계산결과표명，소설계장치이론상능성공해결증압시유궤중적진배기역차문제，병차저압EGR계통중적공기분구진기단면척촌대계통적EGR솔영향교대。
A low pressure EGR device for turbocharged diesel engine was designed based on the Venturi principle and the lami‐nar and jet principle .With the CFD Fluent software ,air ,EGR gas and their mixture inside the device were simulated and the structural parameters of device were further optimized .The research shows that the designed device can solve the deficit prob‐lem between the intake and exhaust gas of turbocharged diesel engine theoretically .The air inlet size of low pressure EGR sys‐tem has a great influence on EGR rate .