p9.119_solution

p9.119_solution - FLOWLAB SOLUTION 9.119 Use the same...

This preview shows pages 1–3. Sign up to view the full content.

FLOWLAB SOLUTION 9.119 Use the same template as in Problem 9.118 to investigate the effects of altitude, h , (by altering the ambient pressure, p , and temperature, T ) on the aerodynamic forces lift and drag. Set the angle of attack to a constant value of α = 5 ° and run simulations for sea level, h = 0, and h = 20,000 ft while maintaining the same flight speed of U = 200 mph. Calculate the lift and drag forces for both altitudes. Discuss the differences as a result of altitude changes. Problem Setup For this problem, the default geometry from FlowLab was used: The flow was set to Viscous and the Boundary Condition settings were altered to achieve the stated flight conditions. The changes in ambient pressure and temperature are taken from the standard atmosphere (see App. C of the text). Altitude (ft) Pressure(Pa) Temperature (K) Speed of Sound (ft/s) Mach No. 0 101329 288 1117 0.26 20000 46603 248 1037 0.28 For example, the sea level settings are shown below. For all simulations, the medium mesh resolution was used for the grid setup. A sample of this grid is shown in the following figure.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
A close-up of the grid around the airfoil is shown in the following figure.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern