Question

Turbomachinery Course

Clearly explain the difference between stall and surge.

Answer 1

surging complete breakdown of steady occurs at * Surging is the How in the compressor which I low flow rate. surging takes place when compressor is operated off the design point and it affects the whole Machin, and this is aerodynamically undesirable x surging can damage the rotor bearings rotor seals, compresor driver & affects the whole cycle operation can * Surging occur when of the mass How goy to the comprenor falls below a critical level, with a high pressure difference. of surge results in ;) High Vibration in Abnormal noin Ti Increan in temperature iw Rapid changes in overall Thurst of surge can prevented by i) Increan How is Redun the spud (1) Reduce differential head

fru its stalling when the compresor is operated away Jusion point thi goy How into the aerodynamic components (impellers blacks, diffuum etc..) deviates from it design direction. If the angle of deviation is large How separation occurs. * stalling occur dm to incorrect black desigo or angle oL attach. of atta * Due to stalling blach failure will occur ay a result of that, reversal How of air occur. * At higher incident angley the How fully separates at the impeller leading edge or diffuur inlet of flow is said to be stalled. sun two terms having f Surge & stall the no in both can the air How reversal of can Meaning in both occury. logo * comprenor stall will result in thurt and which will produce backfir und of air sound like flow. due to revern dy t in 애 아