Generation of high-frequency harmonicas under intensive fluctuations of gas in closed pipe

On the base of viscous compressed termocondactivity gas models fluctuations are numerically researched of the gas pole in the closed pipe at excitation flat piston, moving on the harmonic law with the amplitude, comparable to the length of the resonator. As a result effect is discovered of arising the high-frequency fluctuations of the gas pole under fixed frequency of excitation, connected with increasing own frequency of the system in consequence of the growing of the average temperature of the gas.