CFD Simulation of Flow Distribution in a Waste Heat Boiler Duct
Abstract
Vibrations are observed in the ducts when the flow enters through Regenerative Air duct and Gas turbine duct and flows through the diverging part of the boiler ducts. Due to this vibration, the boiler ducts have failed in their operation and had developed cracks on wall and finally damaged the whole system. CFD analysis is a new technique with the help of which we can solve the practical examples in a numerical manner and with the help of which a lot of time, money and materials can be saved. Here in this project CFD analysis can be used to predict the flow behavior inside the ducts by the help of which a prediction can be made so as to optimize the design of the Waste heat Boiler duct for minimum vibration.
After the analysis it is found that CFD has helped in optimizing the model in a way that the introduction of the guiding plates has helped in reducing the disturbance of the flow which in turn will reduce the vibration in the model. Different cases are tried and results and discussion are presented in this report. Totally four cases are tried which consists of a base case without the guide plates and three cases with guide plates are tried. In the second case two guide plates are introduced at the RA duct and results are observed. Two guide plates didn’t gave proper flow and hence in third case 4 guide plates in the RA duct were introduced, this option gave better results in the RA duct but the flow in the GT duct the flow was not yet proper. Finally in the fourth case along with four guide plates in the RA duct, two guide plates in the GT duct was made and results were observed. It was found that the fourth model gave best results compared to all cases and hence is an optimized model.
Author
Nivash V
Dharmalingam R
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