In the compressor performance curve(pr flow rate vs mass flow rate) if the compressor is operated in regions left of the surge limit line instability occurs in the t/c operation.under stable operation region any change in amount of air taken is into the turbo charger is accommodated by change in pressure ie one is balanced by other. So when the t/c operates in the unstable region any reduction of air demand on the
discharge side of the compressor causes the pressure to fall. if this occurs rapidly and air flows back from the scav air receiver to diffuser. this process is cyclic. it can be avoided at the design stage if scav trunk is large enough to reduce pressure fluctuations and t/c must be carefully matched to the engine
discharge side of the compressor causes the pressure to fall. if this occurs rapidly and air flows back from the scav air receiver to diffuser. this process is cyclic. it can be avoided at the design stage if scav trunk is large enough to reduce pressure fluctuations and t/c must be carefully matched to the engine
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