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.
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.
The relative strengths and drawbacks of the Reynolds stress model, algebraic stress models, shear stress transport, and v2f turbulence models for impinging jet flow and heat transfer are compared in the chapter.
In the terminology of [6], there are two classes of asymptotic one-dimensional models for a jet, that is, string and rod models.
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.
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.
The results of the sub-model for the jet show that its energy intensity is more evenly distributed and at a substantial higher level compared to conventional nozzle concepts.
