单微射流作动器定向控制主流数值模拟

采用Beam—Warming近似因式分解法求解二雄、粘性、非定常、可压N—S方程,对单微射流作动器定向控制主流的合成流场进行数值模拟。计算结果揭示了主流在单微射流旋涡对的影响下会产生偏转,并初步探讨了其产生偏转的原因。分析了主流的偏转程度与主流和微射流作动器之间距离的关系。

Numerical Study of the Effectiveness of Using a Single Micro-Jet Actuator to Vector Primary Flow

Ref.2 performed experiments on the effectiveness of using synthetic jet actuators to perform vectoring control of primary flow. We now explore theoretically as a first step the effectiveness of using a single micro jet actuator to vector primary flow. In a previous paper authored by us, Ref.3, we added many essential details to the method of Rizzetta et al , which had been published without these essential details. We use Ref.3 to perform numerical simulation in this paper. Section 3 explains in much detail the results of our numerical simulation. These results are shown in Figs.1, 2, 3, and 4 and listed in Table 1. They show that the primary flow can be vectored and "pulled" to the micro jet actuator even though the momentum of micro jet is very small compared with that of primary flow. The cause of this "pulling" effect is explored in considerable detail when discussing Fig.3.