The blower rotates and releases air at a certain angle to the diffuser vane. The angle of the diffuser vanes are set to receive at that angle. If there is change of angle of the air due to drop in speed, a turbulence created and pressure is exerted which causes surging to take place.
Causes of this phenomenon could be excess dirt clog onto the air filter, air cooler, turbine, compressor, or in the economizer. Therefore, careful cleaning of these parts in the system could prevent the turbocharger from surging.
During bad weather could cause the turbocharger to surge. In bad weather, if the ship is pitching, the load of main engine load and velocity may vary and cause the exhaust gas vary. When the engine rpm is reduced suddenly, less amount of exhaust gas will be produced, which means less energy is supplied to the turbine, so the rpm of it will drop. However, due to inertia, the rpm would take some time to slow down and during this period, the compressor continues to deliver air the build up the pressure in the scavenge space.
When the turbocharger slowed down, the air delivery pressure in the compressor is reduced and it is lower than the pressure in the scavenge space, so the air flow back, and the turbocharger again surge.
Causes of this phenomenon could be excess dirt clog onto the air filter, air cooler, turbine, compressor, or in the economizer. Therefore, careful cleaning of these parts in the system could prevent the turbocharger from surging.
During bad weather could cause the turbocharger to surge. In bad weather, if the ship is pitching, the load of main engine load and velocity may vary and cause the exhaust gas vary. When the engine rpm is reduced suddenly, less amount of exhaust gas will be produced, which means less energy is supplied to the turbine, so the rpm of it will drop. However, due to inertia, the rpm would take some time to slow down and during this period, the compressor continues to deliver air the build up the pressure in the scavenge space.
When the turbocharger slowed down, the air delivery pressure in the compressor is reduced and it is lower than the pressure in the scavenge space, so the air flow back, and the turbocharger again surge.
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