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设计了一种卧式合成双射流激励器(DSJA),并对其在翼展中段控制NACA0015翼型大攻角流动完全分离进行试验研究,分析了合成双射流激励器两射流出口位置及射流能量对控制机翼流动分离的影响规律。结果表明:合成双射流激励器对机翼大攻角流动分离具有很强的控制能力,可显著提高机翼流动分离攻角;合成双射流激励器两射流出口相对分离点的位置是影响控制效果的重要参数;合成双射流激励器两出口任一出口位于分离点之前,且越靠近分离点,其对边界层分离的控制效果越好,并且当分离点位于合成双射流激励器两出口之间,且离第一出口位置较近时,合成双射流“接力”控制机翼分离的效果更加明显;与合成射流“单射流”相比,合成双射流“两射流”对分离点位置的有效控制区域明显增大。此外,提高合成双射流激励器的射流能量,其控制机翼流动分离的能力提高。
A horizontal hybrid double jet actuator (DSJA) was designed and its control of full separation of NACA0015 airfoil at large angle of attack was conducted in the midspan of the span. The position of two jet outlets and the jet energy of the dual jet actuator were analyzed. Influence on control wing flow separation. The results show that the synthetic dual-jet actuator has strong control over the flow separation at the large angle of attack of the wing and can significantly improve the angle of attack of the wing flow separation. The position of the relative separation point of the two jet exits of the synthetic dual-jet flow actuator is influencing the control effect . The outlet of each outlet of the dual jet actuator is located before the separation point, and the closer to the separation point, the better the control effect on the separation of the boundary layer. When the separation point is located between two exits of the dual jet actuator , And the effect of the dual jet / “relay” control wing separation is more obvious when it is close to the first exit position. Compared with the synthetic jet “single jet”, the synthetic double jet “two jets” The effective control area at the point of separation is significantly increased. In addition, increasing the jet energy of a synthetic dual jet actuator increases its ability to control wing flow separation.