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Cfd Analysis of Convergent- Divergent Supersonic Nozzle
Fig. 2.1 Meshed View of 3 D Nozzle Profile
2.2 Mesh Generation for 2D C-D nozzle
A 2D nozzle profile is modeled in GAMBIT. To generate the structured grid as shown in figure 2.2
with quadrilateral elements Gambit is used. This mesh are in good agreement with turbulence model gave good
results, which otherwise didn’t match with the experimental ones. Nozzle inlet as pressure inlet and outlet as
pressure outlet and remaining as walls the nozzle path are defined as fluid. File is saved for analysis in fluent.
A 2D model of the rotor blades and nozzle for different axial gaps of nozzle exit and turbine rotor
blades are modeled in GAMBIT as shown in Figs. 1.7,1.8 and 1.9. To generate the structured grid with
triangular elements Gambit is used. This mesh are in good agreement with the different model adopted gave
good results, which other wise didn’t match with the experimental ones the boundary conditions are defined
asgiven. Inlet as pressure inlet and outlet as pressure outlet remaining as walls. Meshed models of a partial
admission Case of Nozzle and rotor blades with axial gaps of 3mm, 4mm and 5mm have also been shown in
Figs.2.3, 2.4 and 2.5.
Fig. 2.2 Meshed View of 2 D Nozzle Profile
Fig. 2.3: Meshed View as a Partial Admission Case of Nozzle and Rotor Blades With 3mm Axial Gap.
Fig. 2.4 Meshed View as a Partial Admission Case of Nozzle and Rotor Blades With 4mm Axial Gap.
Fig. 2.5 Meshed View as a Partial Admission Case of Nozzle and Rotor Blades With 5mm Axial Gap.
III. ANALYSIS
The analysis is carried in fluent software by importing the meshed file saved in Gambit. The steps that
are followed are given below which include all the conditions and the boundaries value for the problem
statement.
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