Simulation of inlet swirl and evaluation in flight test

To investigate swirl and perfect evaluation criterion of inlet/engine compatibility,a set of swirl generator was developed with adjustable blade turning angle,height and density.The validation of the swirl generator was testified through numerical simulation and wind tunnel test.The effect of adjustable parameters was also analyzed.Feasible evaluation criterion and measurement method for inlet swirl in flight test was pointed out and applied to wind tunnel test.Numerical and wind tunnel test results show that:(1)The intensity of generated bulk swirl can reach to 28 degrees.(2)Blade density and angle of attack affect swirl intensity most.(3)All kinds of typical swirl can be simulated by different blade distribution.