Unsteady, One-Dimensional Flow in Resonance Tube : with Wall Friction, Heat Transfer and Interaction on a Contact Surface

Abstract

The resonance tube is a cylindrical cavity, closed at the downstream end, which is excited to oscillation by a coaxial air-jet. This paper presents a numerical solution of unsteady, one-dimensional, non-isentropic flow in the resonance tubes by the characteristics method, when the wall friction, the heat transfer and the contact surface are taken into account. The calculations on the flow in tubes are performed numerically under improved boundary condition by the normal mesh method with a digital computer. The calculated results are compared with the experimental ones, and they indicate that the role played by wall friction in the thermal effect of resonance tube should not be neglected in comparison with the shock wave propagating in the tube.