Abstract
Steady state surface rothalpy over specific heat at constant pressure (temperature units) results obtained with a linear unsteady solution-based lumped deterministic source term are compared with results obtained from a traditional, nonlinear, inviscid unsteady solution for an aircraft engine first stage high-pressure turbine rotor configuration. The relationship between the source terms and traditional solution variables is explored to offer a unique insight into comparing the two approaches. Boundary condition/potential field effects and the order of accuracy of the available schemes are also explored and show a significant effect on surface rothalpy results. The new technique demonstrates a significant potential for approximately including unsteady hot streak effects in time average calculations with minimal computer effort.
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