In contrast to the well-known solutions in which the condition at the stream boundaries has the same form for all walls of the tunnel, in the present formulation the stream boundaries are divided into sections of two types with different boundary conditions. These conditions are general for any Mach numbers. The plane limiting boundary problem on the subsonic flow over a dipole is solved in elementary functions for the case of small velocity perturbations at the stream boundary and a low perforation factor. The solution obtained, while not coinciding with the solution for the case of unperforated walls everywhere when the perforation factor equals zero, gives a simple rule for allowing for induction.
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Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 6, pp. 130–136, November–December, 1977.
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Marevtseva, N.A. Induction of subsonic wind tunnels with slight perforation. Fluid Dyn 12, 922–928 (1977). https://doi.org/10.1007/BF01090330
- Boundary Condition
- Mach Number
- Wind Tunnel
- Boundary Problem