CAJ | 학술논문

为找到航空发动机燃-滑油热交换器焊缝裂纹产生的主要原因，对燃-滑油热交换器进行了稳态工作应力仿真分析，提出一种新的安装思路，并对在新的安装方式燃-滑油热交换器进行了整体和失效部位的工作应力仿真分析。结果表明，新安装方式可以有效改善发动机工作时热交换器的工作应力分布和降低峰值，为降低热交换器工作应力和预防焊缝裂纹找到了有效的途径和方法。
위조도항공발동궤연-활유열교환기한봉렬문산생적주요원인，대연-활유열교환기진행료은태공작응력방진분석，제출일충신적안장사로，병대재신적안장방식연-활유열교환기진행료정체화실효부위적공작응력방진분석。결과표명，신안장방식가이유효개선발동궤공작시열교환기적공작응력분포화강저봉치，위강저열교환기공작응력화예방한봉렬문조도료유효적도경화방법。
To find the main cause of fuel -lubricating oil heat exchanger＇s weld cracks on a certain aero - engine, the paper gives a steady simulation analysis of fuel - lubricating oil heat exchanger. Then, a new installation method is presented and the working stress of the entire and disabled parts of the newly fuel -lubricating oil heat exchanger are analyzed. The results show that this new installation method can effectively improve the working stress distribution of the heat exchanger and reduce the peak. Thus, the effective ways are found for reducing the working stress of the heat exchanger and pre- venting the weld cracks.