Probabilistic Assessment of Thermal Gradient In Bolted Flange of A Gas Turbine Engine
Journal Title: International Journal of engineering Research and Applications - Year 2018, Vol 8, Issue 2
Abstract
Recent developments of higher temperature, pressure and speed in gas turbine technology demands closure bolted flanges. Thermal analysis of bolted flange joint is also critical along with structural analysis as they experience huge thermal gradients. Stresses induced due to thermal gradients also influence the Low cycle fatigue (LCF) life of the flange joint especially during transient conditions of the flight cycle. Several parameters like flange dimensions, gap between the flanges and thermal boundary conditions on the inner and outer sides of joint influence flange joint thermal gradient. The present study investigates the variation of flange gradient the variation flange height, flange thickness and gap. Both parametric and probabilistic studies have been carried out to identify most significant parameter which influences the flange gradient. In probabilistic approach the variation in the input parameters can be captured using probabilistic sampling like normal distribution, which is closer to the reality. The results presented in this paper will be helpful to the designer in designing better bolted flange joints with improved LCF life.
Authors and Affiliations
Krishna Nelanti, Harikrishnan L. , Nagaraju Kanike
Keywords
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- EP ID EP393720
- DOI 10.9790/9622-0802023136.
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