A pressurebased computational fluid dynamics methodology has been employed, incorporating extensions to handle hi. Numerical predictions of turbulent underexpanded sonic. Pdf cfd shock diamonds in an underexpanded jet saurav. If no figure exists, then the number of rows is equal to the default length of 256. Pdf determination of underexpanded hydrogen jet flame. Supersonic nozzle design tool file exchange matlab central. Underexpanded jet development from a rectangular nozzle. It uses the classic method of characteristics moc technique to design a jet nozzle and. Pdf flow structure of supersonic jets from conical cd nozzles. Simulation of underexpanded supersonic jet flows with. Background oriented schlieren implementation in a jetsurface. To achieve a detailed understanding of underexpanded supersonic jet structures in. Pdf the flow structure of supersonic underexpanded jet impinging on axisymmetric jet deflectors ramp and saturn deflector has been. Each row in the array contains the red, green, and blue intensities for a specific color.
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. Computed results are post processed using matlab and tecplot. A free underexpanded jet quickly expands into the ambient pressure. After several seconds this will open the graphic user interface. 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. If you find errors in the program or would like to suggest improvements, please send an email to nancy. Downloaded by nasa glenn res center on january 15, 20. 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. Determination of underexpanded hydrogen jet flame length with a complex nozzle geometry. I got the figure for the nozzle contour from the code. Jet variant file exchange matlab central mathworks.