本文選題：葉片顫振 + 激波�。� 參考：《推進技術》2016年03期

【摘要】：為了研究激波對葉片氣動彈性穩(wěn)定性的影響,基于諧波平衡計算方法,結(jié)合結(jié)構(gòu)動力學分析,采用單向耦合方式下的能量法對跨聲速風扇的顫振特性進行了數(shù)值研究。計算結(jié)果表明:設計點工況下,二階彎曲模態(tài)時葉片的最小氣動阻尼系數(shù)小于0,數(shù)值為-0.338%,意味著葉片存在失穩(wěn)風險;此外,100%等轉(zhuǎn)速線不同工況下葉片的顫振特性不盡相同,激波位置變化對氣流做功的影響是導致葉片氣動彈性穩(wěn)定性差異的主要誘因。
[Abstract]:In order to study the effect of shock wave on the Aeroelastic stability of blades, the flutter characteristics of transonic fan were numerically studied by energy method under unidirectional coupling based on harmonic balance calculation method and structural dynamics analysis. The calculated results show that the minimum aerodynamic damping coefficient of the blade is less than 0 in the second order bending mode, and the numerical value is -0.338, which means that the blade has the risk of instability, in addition, the flutter characteristics of the blade are different under different operating conditions with 100% constant rotational speed line. The influence of shock position on the work of airflow is the main cause of the difference of Aeroelastic stability of blade.
【作者單位】： 西北工業(yè)大學動力與能源學院;
【基金】：國家自然科學基金(50706039) 航空科學基金(2012ZB53022)
【分類號】：V215.34

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本文編號：2051529