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Iterative Nonlinear Modeling Of Exhaust Pressure Pulses From A Small Rotary Engine., Robert G. S. Gaspar
Iterative Nonlinear Modeling Of Exhaust Pressure Pulses From A Small Rotary Engine., Robert G. S. Gaspar
Electronic Theses and Dissertations
An experimental study was undertaken to investigate some of the factors affecting the behaviour of pressure variations in a straight exhaust pipe attached to a rotary engine. The investigation involved the measurement of engine load, speed, fuel consumption, combustion air properties and flow rate, mean static pressure near the exhaust port, mean temperatures at two locations in the exhaust pipe and transient gas pressures at two locations in the exhaust pipe. A theoretical, nonlinear model of the particle velocity of a gas excited by an acoustic wave propagation was modified to model the transient pressure behaviour of an acoustic wave. …
Torsional Oscillations In A Geared System With Clearances., Subhash Chandra. Jasuja
Torsional Oscillations In A Geared System With Clearances., Subhash Chandra. Jasuja
Electronic Theses and Dissertations
The torsional vibration characteristics of a geared system with clearance are investigated in this study. The clearance results in a bilinear restoring force characteristic which is non-linear in nature. This particular type of non-linearity causes the generation of ultraharmonic, harmonic and subharmonic resonances. Analytical solutions are derived for ultraharmonic, harmonic and subharmonic resonances by the application of the Ritz averaging method with two or three term approximations for forcing functions of the type T cos (omega)t and C (omega)('2) cos (omega)t. T and C are constants and (omega) is the forcing frequency. The accuracy of this approximate method is verified …