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http://www.hitechcae.com/case-studies/cfd/visualizing-fluid-flow-inside-the-modified-inlet-duct.php
Visualizing Fluid Flow Inside the Modified Inlet Duct Case Study Highlights Client Profile: Air Pollution Control Systems Manufacturer, USA Objective: Simulating air and fuel flow inside the modified inlet duct to visualize flow pattern and analyze flow properties distribution. Challenges: Developing fluid domain for the duct = considering the baffles and fuel quills = Ensuring fine meshing at critical regions to
capture the flow physics accurately = Selecting suitable turbulence model to suit the
case requirements Solution: The modified inlet duct design was analyzed for airfuel mixture uniformity, considering the effects of upstream and downstream baffles. Using realizable k-epsilon turbulence model, the fluid flow behavior was accurately predicted to identify wake regions along the duct length. Using species transport equations, fuel mass and mole fractions were calculated and the results were found satisfactory at the duct outlet.
Regenerative thermal oxidizers are excellent in treating harmful exhaust gases through heating. The efficiency of these pollution control devices rely upon the heating ability, achieved through efficient burning of air-fuel mixture using burners. The uniformity in air-fuel mixture is thus important, which is usually achieved by placing baffles at appropriate locations along the length of the inlet duct. Hi-Tech provided a simulation solution to predict the mixture uniformity inside the inlet duct, designed for a customized regenerative thermal oxidizer developed by a leading air pollution control systems manufacturer from USA.
The Solution The fluid domain for the inlet duct was developed, considering the upstream and downstream baffles as well as fuel quills. Boundary conditions such as fuel and air mass flow rate were applied and appropriate turbulence model along with conservation equations were solved using ANSYS Fluent. To determine the species concentration, incompressible flow model with species transport equations were solved. Pressure and velocity distribution across the duct as well as mass and mole fraction of the fuel were measured. The results indicated a uniform concentration of fuel with the air near the duct outlet.
Benefits = Predicted the effectiveness of modified duct design without prototyping trials = Future modification in the design made easier = Improved efficiency of the regenerative thermal oxidizer
About Hi-Tech
Author: Mehul Patel CFD Consultant
Hi-Tech CAE is a division of Hi-Tech Outsourcing Services, a pioneer engineering outsourcing company since 1992 based in India & USA. It provides expert Computer Aided Engineering - CAE consulting services for engineering / product design analysis by modeling & simulation. The primary services extended include Computational Fluid Dynamics (CFD), Finite Element Analysis (FEA), product design optimization and value engineering services to Automotive, Building / Construction, Process industry, Power Generation, Manufacturing & Heavy Engineering industries.
Phone: +1-408-338-8047 Email: info@hitechcae.com
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Hi-Tech Outsourcing Services 547 Moreland Way Santa Clara, CA 95054
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Copyright Š 2014 Hi-Tech Outsourcing Services All Rights Reserved
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