Investigation of oscillation regimes for a modified Carnot engine: I. Conservative oscillation regimes

The Carnot engine, the model from which the concept of entropy arose, is a parametric generator. A certain modification of the engine has allowed it to be brought into the periodic regime of a stable limit cycle. A formula identical to the expression for the oscillation frequency of a Helmholtz resonator has been derived for the piston oscillation frequency in a quasi-harmonic small-amplitude regime. The shape of the piston oscillations and the form of the phase trajectories are considered in computer simulations for various initial conditions and large amplitudes.