GENERATION OF HIGH-FREQUENCY HARMONICS
IN THE CASE OF LARGE-AMPLITUDE VIBRATIONS
OF A GAS IN A CLOSED TUBE 
A. L. Tukmakov

UDC 534.222

Based on the model of a viscous compressible heat-conducting 
gas, the author investigates numerically the vibrations of a gas column 
in a closed tube in excitation by a flat piston that moves according 
to a harmonic law with an amplitude comparable to the resonator length. 
Consideration is given to the process of transformation of the mode 
and frequency of vibrations of the gas column for a fixed excitation 
frequency; the transformation is accompanied by a change of the type 
of resonance and is related to the increase in the eigenfrequency 
of the system due to the increase in the average temperature of the 
gas.

Institute of Mechanics and Mechanical Engineering, Kazan 
Scientific Center, Russian Academy of Sciences, Kazan, 
Russia; email: tukmakov@sci.kcn.ru. 
Translated from Inzhenerno-Fizicheskii Zhurnal, 
Vol. 74, No. 5, pp. 39-43, September-October, 2001. 
Original article submitted April 21, 2000; 
revision submitted December 19, 2000.


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