I want to contact a "Angel Investor" or a "Venture Capitalist" in Chennai. Can someone Help?

Angels are every where and will be watching eagerly to bless you, If you have a great idea.

Patent it and then discuss about it at banks and other business forums the angels will follow you, you need not search for them.
References :

Venture Capital funding is costly and may result in you losing part of the rights to your company, your idea or your product.

Before you consider this type of investor, you may want to establish your business plan, speak with local banks, visit your Small Business Administration Office (if you have one) and then and only then if you determine VC is the way to go should you begin researching firms.

Be sure you are aware of all of the 'perks' that they are requesting from you before accepting financing.

There are some great write-ups about venture capital at http://www.fingad.com - take some time to review them!
References :

hi,
contact citibank, icici bank they have venture capital wing.
also chrys capital.

you can go for tamil nadu industrial investment corporation (TIIC) for loan. this is the cheapest thing. you can approach banks also for loans.

http://vbulls.com/
References :