本文選題：大焓降 + 靜葉�。� 參考：《汽輪機(jī)技術(shù)》2016年01期

【摘要】：以氣動(dòng)性能優(yōu)良的尾緣正彎積迭的大焓降靜葉為原型,采用5條具有控制點(diǎn)的B樣條曲線作為沿流向的控制線設(shè)計(jì)翹曲端壁,研究翹曲端壁對端部的流動(dòng)控制和探索翹曲端壁降低損失的機(jī)理。通過商業(yè)軟件NUMECA數(shù)值研究了翹曲端壁對大焓降靜壓總壓損失及根部載荷分布的影響,指出翹曲端壁可降低端部區(qū)域的橫向壓力梯度,削弱二次流強(qiáng)度,同時(shí)也增加摩擦損失,選擇適合的翹曲型面并控制翹曲幅度在邊界層以內(nèi)可有效降低端部總壓損失。
[Abstract]:The large enthalpy drop static vanes with good aerodynamic performance are used as the prototype, and five B-spline curves with control points are used to design the warping end wall along the flow direction control line. The flow control of warpage end wall to end wall is studied and the mechanism of reducing warpage end wall loss is explored. The effect of warpage end wall on total pressure loss and root load distribution of large enthalpy drop static pressure is studied numerically by commercial software NUMECA. It is pointed out that warpage end wall can reduce transverse pressure gradient in end region, weaken secondary flow strength and increase friction loss. Selecting a suitable warping surface and controlling the warping amplitude within the boundary layer can effectively reduce the end total pressure loss.
【作者單位】： 哈爾濱汽輪機(jī)廠有限責(zé)任公司;哈爾濱工業(yè)大學(xué)能源科學(xué)與工程學(xué)院;
【分類號】：O35

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