Vinodh I get many questions about wind tunnel design. Like any experimental facility, a wind tunnel design depends on the project requirements and objectives, which are unknown to me. So, I can only offer
Hi animesh, I can only assure you that there is a lot of scope for the aero-field for job prospects and it's an excellent institution. However, It is not proper to for me to advice on money vs returns
Sangeeth - A cambered airfoil will have a nose-up pitching moment relative to the aerodynamic center (AC) due to the chordwise loading. The aerodynamic center is the point about which the pitching moment
Abdul - Do a google search on engineering schools U.S. and visit website of any school. For example, see U. of Washington - Seattle ( http://www.washington.edu/) for departments, curricula, entrance requirements
Klutz - The best major is one that is of most interest to you. I do not know if you have an adequate academic background for graduate work in aero. You should contact an engineering school of your choice

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