储能空气透平低压进气结构优化设计  

Optimal Design of Low Pressure Inlet Structure of Energy Storage Air Turbine

作　　者：白昆仑 平艳 杨长柱[1] BAI Kunlun;PING Yan;YANG Changzhu(Dongfang Turbine Co.,Ltd.,618000,Deyang,Sichuan,China)

机构地区：[1]东方电气集团东方汽轮机有限公司,四川德阳618000

出　　处：《东方电气评论》2024年第3期61-66,共6页Dongfang Electric Review

摘　　要：本文对某储能空气透平低压进气结构进行了优化设计,包括在进气管道与进气腔室衔接处增加过渡倒圆、采用变截面腔室、腔室底部增加平直段和导流锥三种方式,数值分析结果显示:相对于原始方案,优化后进气结构内的局部流速明显降低,流线分布更加均匀,因此壁面熵显著减小,最终导致压损大幅降低,仅为原始方案的53.1%;此外,进气结构出口马赫数和气流角分布也更加均匀,导致首级叶片效率提升约3.3%;对比来看,增加过渡倒圆结构收益最大,采用变截面腔室、底部增加平直段和导流锥也有一定的收益。This paper optimizes the low pressure inlet structure of a energy storage air turbine in three ways,which are adding a transition chamfering at the junction of the inlet pipe and the inlet chamber,using variable section chamber,adding straight section and diversion cone at the bottom.The numerical analysis results show that,compared with the original scheme,the local flow rate in the inlet structure decreases significantly,and the distribution of streamline becomes more uniform,which decrease the entropy near the wall and reduce the pressure loss finally.The pressure loss is only 53.1%of the original scheme.The Mach number and flow angle distribution at the outlet of the inlet structure become more uniform,which increase the efficiency of the first stage by 3.3%.By contrast,adding transitional chamfering structure has the greatest benefit,using variable section chamber,adding straight section and diversion cone also have some benefits.

关 键 词：进气结构 总压损失 效率 储能 

分 类 号：TK02[动力工程及工程热物理]