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DOI: 10.1615/ICHMT.2009.HeatTransfGasTurbSyst.230
12 pages

Rabah Dizene
Mechanical Engineering Department, Advanced Mechanics Laboratory, University of USTHB, ALGERIA

Djamel Chekerker
Mechanical Engineering Department, Advanced Mechanics Laboratory, University of USTHB, Bab Ezzouar, 16110, Algiers ALGERIA


The IGV compressors at stationary applications are subject to inlet total pressure distortion as well, for example, in industrial installations with poorly designed upstream bends. The consequences of a compressor include performance degradation, unsteady blade forces, vibration and very importantly, a reduction in stall margin when compared to a compressor with no distortion. Impact of exhaust air flow front bulkhead on the inlet Guide Vane of MS5002B gas turbine compressor is covered. In order to judge the degradation of aerodynamic components, we will evaluate the effect of air flow coming from the front bulkhead. Flow disturbances created at the bulkhead installed upstream the row of IGV cause cracking and change the IGV blade surface with increasing local dynamic stresses. Bulkhead caisson air flow needs to be analyzed for determining the optimal forms of its sidewall that influences the behavior of flow through the IGV. Complex phenomena of turbulent air circulating within the bulkhead chamber were found most often on gas turbines types of MS 5002B with a suction side of a right side. Dead zones and eddies moves appear and constitute obstacles to the flow.

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