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- W2015289375 abstract "The regression rate of the hybrid rocket fuel grain can not respond to changes in the wall heat flux instantaneously due to the finite thermal conductivity of the solid fuel. The transient heat flow in the solid determines the dynamics of the regression rate response during wall heat flux variations. For most hybrid systems, the thermal transients in the solid fuel is the rate limiting step in establishing the dynamic behavior during transient events such as ignition, throttling and instabilities. This phenomenon with emphasis on the nonlinear characteristics is the primary focus of this paper. For the sake of completeness, the existing one-dimensional model and the linear solution to the thermal lag problem has been reviewed. Later the numerical simulations and a second order perturbation solution have been utilized to characterize the nonlinear behavior of the thermal lag system. The numerical solutions have been used to show a net upward shift in the regression rate oscillations under sinusoidal surface heat flux loading. The upward shift does not result in an increase in the average regression rate due to the changes in the wave form of the regression rate oscillations induced by nonlinear effects. Even though the thermal transients in the solid can not directly contribute to the “DC Shift” phenomenon, when they are coupled to the combustion and heat transfer processes they could indirectly participate in the generation of important nonlinear behavior." @default.
- W2015289375 created "2016-06-24" @default.
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- W2015289375 date "2007-07-08" @default.
- W2015289375 modified "2023-09-25" @default.
- W2015289375 title "Thermal Transients in the Hybrid Rocket Fuel Grains - Nonlinear Effects" @default.
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- W2015289375 doi "https://doi.org/10.2514/6.2007-5369" @default.
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