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气泡致动器的弹性薄膜厚度不均、高压气体泄露、刚性基底以及缺乏控制依据是制约其实际应用的关键问题。为了解决上述问题,采取了如下措施:对现有成膜工艺进行了改进,提高了弹性薄膜厚度的一致性;开发了一种新的气泡致动器的制作工艺,避免了原制作工艺中的粘接环节,保证了气泡致动器的气密性;使用柔性材料作为基底,器件可弯曲变形,便于安装在翼型表面;采用Mooney-Rivlin超弹性材料模型对气泡致动器弹性薄膜的变形进行分析,确定了不同厚度的薄膜变形高度与压力的理论关系,同时指出,在相同条件下宽度是影响气泡薄膜变形的主要因素,为气泡致动器的控制提供了参考。实验证明:所开发的气泡致动器可以有效地进行延迟分离,降低压差阻力,实现了主动流动控制。
Bubble actuator elastic film thickness unevenness, high pressure gas leaks, rigid substrates and lack of control basis are the key issues that restrict its practical application. In order to solve the above problems, the following measures were taken: the existing film forming process was improved to improve the consistency of elastic film thickness; a new bubble actuator manufacturing process was developed to avoid the original manufacturing process The bonding process ensures the airtightness of the bubble actuator. The flexible substrate is used as the substrate, the device can be flexibly deformed for easy installation on the airfoil. The Mooney-Rivlin hyperelastic material model is used to deform the flexible membrane of the bubble actuator The relationship between the deformation height and the pressure of different thickness films was determined. At the same time, it was pointed out that the width was the main factor affecting the deformation of the bubble film under the same conditions, which provided a reference for the bubble actuator control. Experiments show that the developed bubble actuator can effectively delay the separation, reduce the pressure drop resistance, to achieve the active flow control.