喷气推进系统的用能分析

AN ANALYSIS ON ENERGY UTILIZATION OF JET PROPULSION SYSTEMS

关键词:  喷气推进  热力学性质  能量性能

Key words:  Jet propulsion  Thermodynamic property  Energetic property

摘要:

应用工程热力学中技术功的概念和exergy分析的方法，以简单涡轮喷气推进系统为例，用一种新的观点对这类移动的开口系统进行了用能效率的分析。所得到的能流图和exeryy流图能够非常清晰地显示出系统各个部件中能量转化的情况，为部件性能的改进和整个系统效率的提高提供了有用的信息。这种分析方法摆脱了传统的脱离实际的循环分析，能够方便地处理诸如内外函发动机以及火箭发动机等各种复杂循环的系统。exergy分析能够更清楚地显示不可逆损失在各部件中的分配，从而更明确地指示改进的方向。

Abstract:

The energy utilization analysis for a open flight system, such as turbojet propulsion system, was carried out by means of technical work concept and exergy analysis used in engineering thermodynamics. The energy flow chart and exergy flow chart obtained can show very explicity the energy conversion among different components within the system, and present useful information concerning the improvement of component performance and system efficiency. This method can get rid of the shortcoming of the conventional cycle analysis with which some impractical conversion may be allowed, and it can be conveniently used for complicated cycle system, such as by-pass flow engine and rocket engine, etc.