Numerical Simulation of Duct Flow about Shape and Arrangement of Inlet Guide Vane to Increase the Temperature Uniformity

전치 가이드 베인 배치 및 형상에 따른 보일러 입구 온도분포의 수치해석 연구

Diverging channel from gas burner exit to the inlet section of Heat Recovery Steam Generator (HRSG) has been re-designed for 1 MW steam supply and power generation system. Three different test geometries have been chosen for the numerical simulation. The existing design for 300 kW HRSG system (CASE B) has been improved by geometry and position changes of inlet guide vanes along with gas velocity entrance angle at the diverging channel inlet (CASE C). Both cases has been compared with the case where hot combustion gas is directly injected without any guide vanes (CASE A). Improved design shows overall uniform velocity and temperature distribution compared to existing design.