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The calculation model for jet coefficient of water jet pump, and the enthalpy of mixing of water jet pump outlet were determined, and the calculation model of economical indexes of unit based on the thermal balance method was built.
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Evidence cited suggests that if using an LES model for jets, choosing the numerically best conditioned or the one the code has or, for a dissipative solver, even LES model omission seems sensible.
Current results are the first quantitative measurements of OH time-histories during high-pressure oxidation of these fuels, and hence are a critical step toward development of accurate reaction models for jet fuel surrogates.
Most models for jet noise assume that the turbulence producing the noise is far enough removed from any solid surface that the presence of surfaces (such as the nozzle itself) has negligible effect on the sound field.
And their relationship was analyzed according to fluid dynamics, showing that the optimum jet distance increases gradually with decreasing nozzle diameter and a mathematical model for optimizing jet distance S and nozzle diameter is put forward: S="D−d/2tan22.43−0.87d+0.11d22.
A rigorous mathematical model for the jet trajectory was developed based on geometric analysis, mass conservation, and momentum.
A numerical model for predicting jet fires resulting from high pressure, sonic releases of natural gas is described.
A string model for the jet dynamics was derived in a slender-body asymptotics from the three-dimensional free boundary value problem given by the incompressible Navier-Stokes equations in [5].
This paper describes the extension and validation of a physically-based phenomenological model of jet fires for predicting the size and position of the fires resulting from underground gas pipeline ruptures and to predict thermal radiation levels around such fires.
The identification procedure is applied to the controlled model of compressors for jet engines.
Results show only very slight changes in the mean flow induced by the plate, and no differences in the velocity fluctuation amplitudes on the jet centreline, suggesting that wave-packet models derived for jets without installation effects may be representative of the installed case, at least for the jet plate distances considered here.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com