Numerical Analysis of Engine Exhaust Flow Parameters for Resolving Pre-Turbine Pulsating Flow Enthalpy and Exergy

Energy carried by engine exhaust pulses is critical to the performance of a turbine or any other energy recovery system. Enthalpy and exergy are commonly used concepts describe transport flow based on first second laws thermodynamics. However, in order investigate crank-angle-resolved enthalpy exergy, significance parameters (pressure, velocity, temperature) their demand for high resolution need be ascertained. In this study, local global sensitivity analyses were performed one-dimensional (1D) heavy-duty diesel model quantify each parameter determination exergy. The effects sweeps analyzed sensitivity, Sobol indices from showed correlations between computed analysis indicated that when considering specific temperature dominant requires pulse. It was found 5% sweep over pulse leads maximum deviations 31% 27% resolving crank angle-based respectively. total rates, velocity most significant parameter, requiring with deviation 23% rate 12% This study will help prioritize fast measurements pulsating context turbocharger inlet analysis.