文档介绍：哈尔滨工程人学硕十学何论文
摘 要
船用燃气轮机排气引射器的结构和气动性能是燃气轮机装舰技术研究的一个重要组成部分。本文一方面根据某型舰船的技术指标要求,以阿期的一种排气引射器为母型初步设计出多种排气引射器的型式,使其引射性能得以改善:另一方面,由于受到船上空间限制,在满足要求的前提下,并不追求最大的引射系数。本文即是针对这两方面的要求,进行燃气轮机排气引射器的设计及数值模拟计算,讨论排气引射器结构对引射系数的影响,给出引射系数的分布规律,为进一步设计高性能的船用燃气轮机排气引射器提供可靠依据。
设计工作者在设计燃机排气引射系统之前必须掌握其气动性能,完全通过模型试验来了解不同型式的排气引射器既耗费较大的人力、物力、财力,同时也需要较长的实验周期。因此,针对实际情况,本文主要进行了以下两个方面的工作:
。在几何边界形状上严格反映物理真实丽不作任何简化,获得了全流场流动特性。
,并对数值模拟结果加以验证。关键词:船用燃气轮机:排气引射器;数值模拟;实验研究;引射系数
哈尔滨工程大学硕士学位论文
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Abstract
The structure and the aerodynamics performance of marl tie gas turbine exhaust ejector system is one of the important aspects when the gas turbine is installed on the naval to the technical specification request of some ships,this article takes the earlier exhaust cjector system as the this foundation,the author preliminary design many kinds of exhaust ejector system to improve its the same time,because the ship sky is limited,it does not pursue the biggest ejector this article,the exhaust ejector system is designed and some nume rical simulations arc carried in view of these two aspects article discusses the influence to the ejector coefficient through changing the structure of the exhaust cjector system,and produces the coefficient distributed provides the reliable basis for further designing the high performance exhaust ejector system.
We must master its aerodynamics performance before finalizing the
design of the exhaust ejector system,It needs more manpower and material resources as well as longer experimental period to realized characteri stic of the different ejector system structures absolutely by model the reality,the following works had been done in this thesis:
numerical simulation of the basic and designed exhaust tor numerical simulation results O