航空发动机管壳式燃-滑油散热器换热特性计算

吕亚国; 刘振侠

doi:10.13224/j.cnki.jasp.2014.12.007

航空发动机管壳式燃-滑油散热器换热特性计算

doi: 10.13224/j.cnki.jasp.2014.12.007

西北工业大学动力与能源学院, 西安 710072

详细信息

作者简介:
吕亚国(1980-), 男, 陕西旬邑人, 讲师, 博士, 主要从事航空发动机燃-滑油系统及空气系统研究.

中图分类号: V233.4
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出版历程
- 收稿日期: 2013-11-15
- 刊出日期: 2014-12-28

Heat transfer characteristics calculation for aero-engine shell-tube fuel-oil heat exchanger

School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China

摘要

摘要: 采用无量纲关系曲线(Re~St·Pr^2/3)计算管壳式燃-滑油散热器管程、壳程表面传热系数,基于效率-传热单元数法建立了管壳式燃-滑油散热器换热特性计算模型;以航空发动机某管壳式燃-滑油散热器少量试验数据为基础,拟合得到了该型散热器管程和壳程Re~St·Pr^2/3关系曲线,并将该关系曲线应用于另一结构类似的管壳式燃-滑油散热器换热特性计算.算例计算表明:计算值与试验数据吻合较好,管程、壳程出口温度相对误差均不超过6.5%,总换热量相对误差不超过7.4%.该方法可应用于航空发动机管壳式燃-滑油散热器设计及验证阶段的换热特性计算.
- 航空发动机 /
- 管壳式燃-滑油散热器 /
- 无量纲换热特性曲线 /
- 换热特性
Abstract: A dimensionless relationship (Re~St·Pr^2/3)was introduced for calculating the heat transfer coefficients in tube and shell sides of shell-tube fuel-oil heat exchanger, and a heat transfer characteristics calculation model of shell-tube fuel-oil heat exchanger was established based on efficiency-number unit method. Based on little experimental data of one shell-tube fuel-oil heat exchanger of aero-engine, the relationships of Re~St·Pr^2/3 were fitted for tube and shell sides of this heat exchanger, and the relationships were applied to heat transfer characteristics calculation of a similar shell-tube fuel-oil heat exchanger. A case study shows that the relative errors of the outlet temperature in tube and shell sides are less than 6.5% and the relative error of total heat transfer is less than 7.4%, indicating that the calculation results are in good agreement with experimental data. The method presented can be applied to calculate the heat transfer characteristics of aero-engine shell-tube fuel-oil heat exchanger in design and validation stages.
- aero-engine /
- shell-tube fuel-oil heat exchanger /
- dimensionless heat transfer characteristics curve /
- heat transfer characteristics

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参考文献(15)

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