UnsteadyTransonic Nozzle Flow with Heat Addition

Unsteady Transonic Nozzle Flow with Heat Addition

Reacting Nozzle Flow

The two limits, “frozen” and “equilibrium” flow share an important property: both are isentropic flows (if we ignore friction or heat losses). This is because, in the frozen case no chemical change during expansion), there are no rate processes at all occurring, the molecules preserving their identity all the way, while in the equilibrium case, in which reactions do occur, their rate is so high...

Heat - Flow Heat - Flow Heat - Flow

Choosing between multiple ontological perspectives is crucial for reasoning about the physical world. Choosing the wrong perspective can make a reasoning task impossible. This paper introduces a Lagrangian plug flow ontology (PF) for reasoning about thermodynamic fluid flow. We show that this ontology captures continuously changing behaviors of flowing fluids not represented in currently implem...

Coupling Heat Transfer and Fluid Flow Solvers for High Area Ratio Rocket Nozzle

Turbulent flow separation coupling heat transfer with the solid case in the high area ratio rocket nozzle is simulated with the CFD method and the results are investigated experimentally. The finite volume method, the 2nd order upwind scheme, SST k-ω turbulence model and enhanced wall function are employed to solve the N-S equation and thermal conduction equation. To predict the fluid field and...

Instability of shock-induced nozzle flow separation

We investigate experimentally the causes of jet plume instability and enhanced mixing observed in the exhaust of shock-containing convergent-divergent nozzles. Key features of the internal flow are the separation shock, separation shear layers, and pattern of alternating expansion and compression waves downstream of the shock. We focus on two possible reasons for this instability—the motion of ...