SRM Institute of Science and Technology, Kattankulathur

If we talk about the aerospace engineering field in SRM University, chances are that you may not get placed in the companies which you want as the companies that show up for the aerospace engineering in SRM are very less and there is a chance that you may not get placed in the desired company and may end up working for some other field.
I don't know much about the scope of this field in SRM but below is the information that may help you:
Description:
2007-11
2008-12
2009-13
Number of students placed:
28(2007-11)
35(2008-12)
35(2009-13)
Number of students not interested:
4(2007-11)
4(2008-12)
19(2009-13)
In-placement
Number of students not placed:
(low CGPA, performance in interviews, arrears at the time of placement but passed out subsequently)
2(2007-11)
10(2008-12)
NIL
Hope it helped.

The answer is no. You cannot get into SRM through TNEA.
Anna University conducts Tamil Nadu Engineering Admissions (TNEA) to offer admissions to candidates in various engineering colleges in the state of Tamil Nadu. TNEA counselling is a single window process and admissions in Tamil Nadu engineering colleges are offered through such a process because authorities believe that such an initiative facilitates transparency.
Here is the list of colleges that accept TNEA scores: https://www.shiksha.com/b-tech/articles/tnea-2014-list-of-tamil-nadu-engineering-colleges-blogId-8105
Sri Ramaswamy Memorial (SRM) University conducts Sri Ramaswamy Memorial University Joint Engineering Entrance Examination (SRMJEEE - UG) to offer admissions to interested candidates in its B.Tech programmes.SRM University also conducts SRM Joint Engineering Entrance Exam (SRMJEEE) through which it offers admissions to candidates in programmes like Health Sciences. Candidates can appear for SRMJEEE either through the paper-pencil mode or even as a computer-based exam.
So for getting into SRM, you need to give SRMJEE.
Sources -
https://www.shiksha.com/b-tech/exams/tnea
https://www.shiksha.com/b-tech/exams/srmjeee-ug

The main campus which is located in Kancheepuram is the best for all the streams provided, because it has the best facilities provided. Also, the number of students from different parts of the country as well as world are much more than any other campus. A lot of co-curricular activities also takes place so you get a good exposure and ample amount of opportunities to take part and do things other than studies. The faculty and the equipment are also a lot better than in any other campus so the main campus is the best option for any stream. Though you will miss out on city life as the city is more than 1hr journey but you'll get a good campus life which city campus won't give.