Damping coefficient of a pressure wave under conditions of pulsating turbulent flow of gas in a channel

Experimental and calculated studies of damping coefficients and phase velocity of waves propagation under conditions of pulsating turbulent flow in a narrow channel were reviewed and analyzed. It is shown that the concept of complex damping coefficient can be introduced only when allowance is made for certain restrictions. Dependence of the value on vibration frequency, the Reynolds and Mach numbers is analyzed. The calculations are made using data on relative amplitude and phase of tangential strain vibrations on the wall obtained when the turbulence model is used. Numerical modeling based on difference solution of the movement continuity and energy equation system, averaged by the tube cross section was made with allowance made for conditions of experiment staging and measurement methods