考虑接触热阻的非连续转子快速启动热分析

徐宁; 王庆超; 王震林; 刘占生

doi:10.13224/j.cnki.jasp.2017.12.011

考虑接触热阻的非连续转子快速启动热分析

doi: 10.13224/j.cnki.jasp.2017.12.011

1.
哈尔滨工业大学能源科学与工程学院，哈尔滨 150001；中国船舶重工集团公司哈尔滨船舶锅炉涡轮机研究所，哈尔滨 150078
2.
哈尔滨工业大学能源科学与工程学院，哈尔滨 150001

基金项目: 青年科学基金(11602071)

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出版历程
- 收稿日期: 2016-09-02
- 刊出日期: 2017-12-28

Thermal analysis for fast start up of noncontinuous rotor considering thermal contact resistance

摘要

摘要: 针对燃气轮机转子非连续性的结构特点，通过考虑粗糙表面的接触热阻，建立了螺栓联接结构的热结构耦合分析模型。研究了快速启动过程中轮毂间接触面上的温度分布及最大应力的变化规律，并分析了表面粗糙度和预紧力等接触参数对接触面间的温度分布、拉紧力及最大应力的影响。结果表明：热冲击下粗糙表面间的接触热阻对接触面的温度分布及最大应力影响明显，接触参数对螺栓联结结构的温度场、应力场及热变形特性影响较大。研究成果可为燃气轮机转子设计、热致振动分析及故障诊断提供理论依据。
- 非连续转子 /
- 接触热阻 /
- 螺栓联结结构 /
- 快速启动 /
- 热结构耦合
Abstract: The thermalstructure coupling analysis for bolted connection was modeled according to the structural features of noncontinuous rotor, taking thermal contact resistance of rough surface into account. The timevarying relationship of temperature distribution and maximum stress during the fast startup of the turbine was investigated. The influence of contact properties, such as roughness and pretightened force, on temperature distribution, tensioning force and maximum stress was analyzed. Results indicated that, the thermal contact resistance had great influence on temperature distribution of contact surface and maximum stress of bolted connection under the thermal impact, the contact property had influence on temperature distribution, deformation distribution and maximum stress. The research provides theoretical basis for the design of gas turbine, contributing to the analysis of thermally induced vibration and fault diagnosis.
- non-continuous rotor /
- thermal contact resistance /
- bolted connection structure /
- fast start up /
- thermalstructure couple

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参考文献(15)

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