Abstract
The present research focuses on dynamic flow control management using tiny jets with three combinations; the first one located at 90 degrees intervals of the base, the second one located at 0.5D (duct diameter) of the wall, and the third one located at both base and wall with a 0.05 radius respectively which injects the air. Comparative analysis with these controls and without control is considered. The wind tunnel tests were done in existence and the absence of the tiny jets. For the experiments, the duct diameter ratio considered was 1.8, the duct length L = 10D, Mach numbers 1.87, 2.2, and 2.58, and NPR's range from 3 to 11. Additionally, the experiments were repeated to design experiments (DOE) method based on the factorial design-L-9 orthogonal array (OA). Three variables with two parameters were designated for flow and the DOE. An analysis of variance, response surface analysis, regression equations, response optimization and data distribution were executed to optimize the experimental results. The established prototypes are statistically appropriate and achieved in generating realistic forecasts for all instances. From the results, it is apparent that for a conferred constraint, one can find a duct length of the circular pipe, which will result in the highest growth or decline of pressure in the base region.