benakaraj e.s.
Name : Benakaraj E.S.
Qualification: Master
of Technology (CIM)
ME Dissertation Project
(2004):
“Stress
and Vibration Analysis of a Gas Turbine Annular Combustor Liner”
Synopsis:
The design of gas turbine combustion
system is a complex process involving fluid dynamics, combustion analysis and
mechanical design. For many years the combustion system was less amenable to
the theoretical treatment than other components of gas turbine and any
development program required a considerable amount of trial and error. With
very high cycle temperature of modern gas turbines, mechanical design remains
difficult. The rapidly increasing use of computational methods in recent years
has a major impact on the design process, enabling the consideration of both
mechanical and thermal loads and their time varying behavior.
The problem involved in the
design of a combustion system is basically one of reaching the best compromise
between a number of conflicting requirements which will vary widely with
different applications. Stresses involved due to mechanical and thermal loads
is of great concern in the mechanical design and lifing of a combustor system.
An understanding of the vibration characteristics of the combustor elements is
also essential to design combustion system.
The
project work carried out comprises of the following:
1. A comprehensive literature survey on different combustion
system, the materials used in their development design methodology adopted etc.
2. An extensive stress analysis considering mechanical load
(differential pressure acting on the combustor liner) and thermal load which
was obtained from a previous heat transfer analysis.
3. An Eigen Value Analysis of combustion liner to obtain different natural frequency
and associated mode shapes.
The stress calculation was carried out
using axisymmetric modeling approach. The eigen value analysis was performed
using shell formulation approach. The front-end commercial software ANSYS (Ver:
8.0) was used in these studies.
Some of the important
results of the investigation:
Contact Details:
Phone : 080-28484820
E-mail: benakarajes@yahoo.com
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