Vortex flow model for the blade-vortex interaction problem

Young, A. D. and Rao, K. N., "Some Low Speed Results on the Effects of Swirl and Velocity Distribution on an Axisymmetric Jet," Aerospace Quarterly, Vol. 29, 1978, p. 4. Morse, A. P., "Some Experiments on the Turbulent Swirling Jet with and without External Stream," Ph.D. Thesis, Imperial College, London, 1979. Samet, M. and Einav, S., "The Directional Pressure Probe," Review of Scientific Instruments, 1984, pp. 582-588.