【摘要】：對吸力面施加合成射流激勵的高負荷壓氣機靜葉柵展開數(shù)值模擬,系統(tǒng)地研究不同激勵參數(shù)對單縫合成射流改善葉柵氣動性能的影響,并探索分段式合成射流控制流動分離的有效性。研究結(jié)果表明,單縫合成射流對柵內(nèi)流動的作用效果主要取決于兩個因素:射流切向動量注入帶來的氣動性能改善與射流輸運過程的附加流動損失。單縫合成射流具有較為寬廣的有效頻率范圍,當激勵頻率等于主流流過葉型的頻率且射流滿足有效激勵動量要求時,對葉柵氣動性能的改善效果最佳,總壓損失降低約14.26%。分段式合成射流能夠較好地適應不同葉高處分離起始點沿軸向變化對最佳流動控制位置的要求,在不增加有效射流面積的前提下可較單縫射流更為有效地控制流動分離,此時的損失降低幅度高達15.84%,從另外一個角度證實了激勵位置對于非定常激勵的重要性。
[Abstract]:The static cascade of a high load compressor subjected to a combined jet excitation on the suction surface was numerically simulated, and the effects of different excitation parameters on the aerodynamic performance of the cascade by single suture jet were studied systematically. The effectiveness of flow separation controlled by segmented synthetic jet was explored. The results show that the effect of single sutured jet on the flow in the grid is mainly determined by two factors: the improvement of aerodynamic performance caused by jet tangential momentum injection and the additional flow loss in the jet transport process. The single sutured jet has a wide effective frequency range. When the excitation frequency is equal to the frequency of the mainstream flow through the blade shape and the jet meets the requirement of effective excitation momentum, the aerodynamic performance of the cascade can be improved best. The total pressure loss was reduced by 14.26%. The segmented synthetic jet can better meet the requirements of the optimal flow control position for the axial variation of the starting point of separation at different blade heights, and it can control the flow separation more effectively than the single slit jet without increasing the effective jet area. The loss reduction is as high as 15.84, which proves the importance of incentive position for unsteady excitation.
【作者單位】： 哈爾濱工業(yè)大學能源科學與工程學院;
【基金】：國家自然科學基金(51306042)
【分類號】：TH45

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1 張秋鴻;;渦輪大擴張過渡段的流動分離與控制數(shù)值研究[J];汽輪機技術(shù);2006年04期

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本文編號：2378897