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The effect of reference environments on the accuracy of the results of an exergy analysis of an aerospace engine.

机译:参考环境对航空发动机火用分析结果准确性的影响。

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摘要

An exergy analysis is applied to a turbojet engine for a range of altitudes from 0 to 15,000 m (∼50.000 ft) and for a 3,500 km flight to examine the effects of using different reference-environment models. The results of tins analysis using a variable reference environment (equal to the operating environment at all times) are compared to the results obtained using two constant reference environments (0 and 15,000 m). The rational efficiency of a turbojet was observed to decrease with increasing altitude, due mainly to an increase in exhaust exergy emissions. The accuracy of exergy results was found to be dependent on the choice of reference environment, where the use of a constant reference environment can lead to errors as large as 52%. For most atmospheric applications, the use of a variable reference environment does not add great complexity to the exergy analysis while yielding the most accurate results.
机译:在0到15,000 m(〜50.000 ft)的高度范围内以及在3500 km的飞行中,对涡轮喷气发动机进行了火用分析,以检验使用不同参考环境模型的影响。使用可变参考环境(始终等于操作环境)进行罐头分析的结果与使用两个恒定参考环境(0和15,000 m)获得的结果进行比较。观察到涡轮喷气发动机的合理效率会随着高度的增加而降低,这主要是由于排气火用排放物的增加。发现(火用)结果的准确性取决于参考环境的选择,使用恒定参考环境可能导致高达52%的误差。对于大多数大气应用,使用可变参考环境不会在提高火用分析的复杂度的同时获得最准确的结果。

著录项

  • 作者

    Etele, Jason.;

  • 作者单位

    University of Toronto (Canada).;

  • 授予单位 University of Toronto (Canada).;
  • 学科 Engineering Aerospace.
  • 学位 M.A.Sc.
  • 年度 2000
  • 页码 67 p.
  • 总页数 67
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航空、航天技术的研究与探索;
  • 关键词

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