Schlieren visualization, pitot probe, and laser doppler anemometry measurements are carried out to capture the plume development in the near field, and in particular the effect on the plume flow of a finitelength extended shelf or aftdeck attached to the. If you find errors in the program or would like to suggest improvements, please send an email to nancy. Converging nozzleconverging nozzle chamber ambientp b flow accelerating m 1 with waves p c underexpanded choked throatexit m1 p e p b p p 1 c p b p c 0 distance down the nozzle exit. An experimental study is reported of underexpanded supersonic jet plumes issuing from a highaspectratio convergent rectangular nozzle. Underexpanded choked throatexit m1 p e p b p p 1 c p b p c 0 distance down the nozzle exit.
Underexpanded jet pfro epb, nozzle produces a jet flow consisting of regions of decreasing and increasing p or density inviscid flow ideal, process would continue endlessly viscous case real, viscous losses and turbulent mixing with surroundings causes wave pattern to decay after small number of cycles p1pb p2pb cl 1 2 3 p3. Computed results are post processed using matlab and tecplot. Supersonic nozzle design tool file exchange matlab central. Pdf the flow structure of supersonic underexpanded jet impinging on axisymmetric jet deflectors ramp and saturn deflector has been. Underexpanded jet development from a rectangular nozzle. A free underexpanded jet quickly expands into the ambient pressure.
Downloaded by nasa glenn res center on january 15, 20. Pdf cfd shock diamonds in an underexpanded jet saurav. Solve for the flow field downstream of a supersonic nozzle using the method of characteristics. To achieve a detailed understanding of underexpanded supersonic jet structures in. Numerical predictions of turbulent underexpanded sonic. This matlab function returns the jet colormap as a threecolumn array with the same number of rows as the colormap for the current figure. Jet variant file exchange matlab central mathworks. Abstractthe objective of this work is to model underexpanded turbulent sonic jets. Determination of underexpanded hydrogen jet flame length with a complex nozzle geometry. It uses the classic method of characteristics moc technique to design a jet nozzle and. After several seconds this will open the graphic user interface. If no figure exists, then the number of rows is equal to the default length of 256. Simulation of underexpanded supersonic jet flows with. A pressurebased computational fluid dynamics methodology has been employed, incorporating extensions to handle hi.
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