【摘要】 以大弯角静子叶型叶栅为对象，构造多种端壁吸气方案。引入密流比分布差作为衡量叶中截面流动二维性的新指标，在0.7马赫数下采用数值模拟方法研究吸气方案对平面叶栅叶中截面流动二维性的影响规律。研究结果表明：不同端壁吸气方案吸气使叶中截面总密流比为1时，叶片表面等熵马赫数分布与二维流动相差很小，但不同方案密流比分布与二维流动差异较大；端壁弦向槽位于叶片尾缘处，可有效控制角区分离，进而有效控制叶中截面密流比，并且达到较小密流比分布差。这种吸气方案可实现叶中截面流动与二维流动较好的一致性。更多还原

【Abstract】 With large angle stator cascade as the reserch subject, a series of endwall suction schemes were designed. A new parameter defined by distance of AVDR distribution between three-dimensional and two-dimensional flow field was introduced to measure two-dimensionality of mid-span flow. Numerical simulations were carried out for the linear compressor cascade to investigate effects of different suction schemes on two-dimensionality of mid-span flow with Mach number at 0.7. The reserch results show that blade surface Mach number distributions change little and are similar to two-dimensional flow in different suction schemes when total AVDR is controlled to 1, while AVDR distributions change greatly and differ from two-dimensional flow. Corner separation is effectively decreased by endwall chord suction slot located near trailing edge in order to control mid-span total AVDR and gain smaller AVDR distribution close to two-dimensional flow. The optimal scheme can achieve good consistency between mid-span flow and two-dimensional flow.更多还原