Abstract
A two-variable method for the blockage interference assessment in a circular tunnel has been developed. The Prandtl-Glauert equation is applied to describe the subsonic flowfield. Analytical solutions are obtained using Fourier transform technique, by either assuming a given body of revolution profile or representing the body of revolution by a source-sink distribution. Numerical examples computed by a small perturbation in viscid code TSFOIL and a panel method code PMARC are utilized to validate the developed two-variable method for open jet and closed circular tunnels. Good agreement has been found on interference pressure coefficient assessment between the solutions of the two-variable method and in viscid code predictions. Results have demonstrated that the two-variable method for circular tunnel blockage wall interference is ready for experimental verification.
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