Free Courses Fluids Structures Electronics 3D Design Optics Photonics Materials Installation Python Optimization Safety & Cybersecurity Embedded Software MBSE Digital Mission Engineering STEM NVH Student Teams Semiconductors Indo Kursus Partner Courses My Courses

[Solution]

This example is taken from Cornell University’s ANSYS AIM Learning Modules

---

Contents

1. Problem Specification
2. Geometry & Mesh
3. Physics Setup
4. Results Evaluation
5. Verification

Problem Specification

This tutorial explores the three dimensional, transonic flow over an ONERA M6 wing. Created in the 70’s, the ONERA M6 wing serves to validate numerical methods of simulation flows. The wing will be subjected to 0.8395 Mach, 460 degrees Rankine and rotated 3.06 degrees, which should produce a Reynolds number of 11.72 million at the inlet. The equations below show how the Mach number was converted to a velocity, which was used as the inlet velocity.

The M6 wing in the ONERA S2MA wind tunnel

---

Geometry & Mesh

 

Download the file here

In this video, you will learn how to import the geometry, perform required geometry operations in Discovery AIM and how to generate mesh in the computational fluid domain.

 

---

Physics Setup

In this video, you will learn how to specify fluid flow conditions.

 

---

Results Evaluation

In this video, you will learn how to evaluate velocity vectors and Pressure contour in the flow domain.

---

Verification

This tutorial will utilize NASA’s extensive study of the ONERA M6 wing using. Below, the pressure contours on the surface and symmetry plane of the ONERA M6 wing are plotted using results from NASA’s WIND code. These pressure contours can be compared to the ones created by AIM.

When the AIM contours are compared with the results from the NASA study, it is evident that the results are similar. The differences are due to the NASA mesh having a much higher resolution, with more than twice as many nodes and boundary layers as the AIM mesh. Refinement of the AIM mesh can be done to improve the correlation.

---

References

Gaultier, Sylvain. “L’aile ONERA-M6, Star De La CFD.” ONERA – L’aile ONERA-M6, Star De La CFD. ONERA – The French Aerospace Lab, 25 May 2013. Web. 13 June 2017.

Slater, John W. “ONERA M6 Wing: Study #1.” NASA. NASA, 30 Aug. 2