Gas Dynamics Simulation
Gas Dynamics Simulation
Embedded Files
In this project, my teammate and I simulated gas dynamics in a converging-diverging nozzle using ANSYS Fluent. Together, we analyzed how variations in back pressure, diverging angle, and throat radius impacted key parameters like Mach number, static pressure, and mass flow rate.
First, I constructed the geometry of the converging-diverging nozzle (provided in problem statement) in Ansys Design Modeler .
Simulation Variables
Simulation Variables
Next, simulation outputs were recorded as per Table on the left to observe the following:
The Mach number and static pressure contour and their variations plot along the nozzle (x-axis).
The mass flow rate and maximum Mach number along the Nozzle as Variable output parameters to monitor. These values for each iteration were recorded in Excel format and the outcome was analyzed.
Summarized Interpretation of the Data
Summarized Interpretation of the Data
1. Back Pressure Reduction:
Reducing back pressure raises the maximum Mach number and mass flow rate.
2. Diverging Angle:
The performance measures are not significantly affected by altering the diverging angle (7° vs. 5°). However, decreasing the diverging angle reduces the outlet area, resulting in a lower Mach number at the nozzle exit.
3. Throat Radius:
Generally speaking, and especially at lower back pressures, a smaller throat radius (10 mm vs. 12 mm) increases the maximum Mach number and the mass flow rate.
As a typical example of the process for the simulations of each iteration, Iteration 1-1 is shown below as an example:
For detailed data on all the iterations, please refer to the full report pdf in the link here: Full report
Process: (Iteration 1-1)
Process: (Iteration 1-1)
Mach number Contour, Variation Plots
Mach number Contour, Variation Plots
Static Pressure Contour, Variation Plots
Static Pressure Contour, Variation Plots
Input and Output Parameter Values
Input and Output Parameter Values
We discovered that reducing back pressure increased the Mach number, smaller throat radii enhanced flow performance, and changes in diverging angles had minimal effects.
Our work allowed us to explore phenomena such as choked flow, supersonic transitions, and shock wave behavior, providing valuable insights for optimizing nozzle designs in aerospace applications.
Page updated
Google Sites
Report abuse