Pressure, force and moment measurement on ONERA M4 Model

Pressure distribution, force and moment on ONERA M4 model is estimated using a pressure scanner, six component balance and data acquisition system in the subsonic wind tunnel at Madras institute of technology, India. ONERA models are made on several scales, to enable comparison of results obtained in a number of wind tunnels with different test section dimensions. A wing-body-tail model of ONERA M4 model of suitable scale to fit in the test section of our subsonic wind tunnel is designed and fabricated with pressure ports at suitable points. The model is to be tested at various pitch angles from -10° to 30°, in steps of 10 degrees. For each pitch angle the velocity is constant and the variation of coefficient of pressure on the surface of the model is determined using a suitable data acquisition system. The experiment is done for zero yaw angle and readings are taken for the calibration model. Pressure plots and aerodynamic coefficient plots are made for constant velocity and different pitch angle.