What causes compressor surge?

Surge occurs when there is no forward flow of gas through the compressor and a reversal of flow occurs. The gas that is being compressed gets pushed backward through the centrifugal compressor. When this surge (flow reversal) occurs, which can happen in milliseconds, the rotor is affected.

What causes surging in a diesel engine?

If an engine is not getting enough fuel (this is called “running lean”), due to fuel pressure (regulated by the fuel pump and regulator), restricted fuel injectors, a vacuum leak or really anything that throws off the fuel mixture going in to the engine, this can cause the surge.

What is not the main reason of turbocharger surging?

Whenever the breakdown of gas flow takes place in the turbocharger, a reversal of scavenging air occurs through diffuser and impeller blades into the blower side which causes surging. The turbine side or exhaust gas side of the turbocharger does not play a direct role in the surging process.

How do I stop my compressor from surging?

6 Ways to to Avoid Centrifugal Compressor Surge

1. Larger Anti-surge Valve (ASV) Size with a Quick Opening Valve.
2. Suction and Discharge Pipe Re-Routing.
3. Re-Positioning Anti-surge Tap off- Point.
4. Slowing Compressor Speed during Coast down.
5. Discharge Side Gas Flaring.
6. Hot Gas Recycle Valve Installation.

What happens during compressor surge?

Surging can cause the compressor to overheat to the point at which the maximum allowable temperature of the unit is exceeded. Also, surging can cause damage to the thrust bearing due to the rotor shifting back and forth from the active to the inactive side. This is defined as the surge cycle of the compressor.

What happens if your turbo blows?

Can you drive with blown turbo? The longer you drive your car with a blown turbo, the more damage the engine will have and therefore the more costly it will be to repair. The longer the blown turbo is left without repair, the more damage can be caused to the car’s engine.

What is turbo Anti surge?

The anti surge ring allows that stagnant air around the cavitating blades to ‘go somewhere’. This brings in new air to the inducer and allows air speed over the inducer to remain high enough that cavitation is reduced.

When does the surging of a turbocharger occur?

Surging of turbocharger occurs when the air pressure after the compressor is higher than the pressure compressor can internally maintain.

What to do if you have a defective turbocharger?

Run engine with 15% of MCR load and 53% speed. Stop the engine. Lock the rotor of the defective turbocharger. Insert orifice plates in the compressor outlet and the turbine inlet. (A small air flow is required to cool the impeller, and a small gas flow is desirable to prevent corrosion) Run engine with 20% of MCR load and 58% speed.

What are the effects of compressor surge on the Turbo?

There is generally concern over the effects compressor surge has on the turbo, ranging from: So what’s the reality? First of all, engine damage is highly unlikely, unless the turbo fails catastrophically and sends bits of compressor through the engine, but even then it would have to make it through the intercooler first.

What was the cause of the caterpillar turbocharger failure?

A turbocharger from a 550 hp Caterpillar engine model 3406E has obviously experienced a compressor wheel failure. The turbine shaft on this turbo actually broke due to the nature of the compressor wheel failure probably happening at very high speed and the imbalance caused a catastrophic failure.

Surging of turbocharger occurs when the air pressure after the compressor is higher than the pressure compressor can internally maintain.

A turbocharger from a 550 hp Caterpillar engine model 3406E has obviously experienced a compressor wheel failure. The turbine shaft on this turbo actually broke due to the nature of the compressor wheel failure probably happening at very high speed and the imbalance caused a catastrophic failure.

There is generally concern over the effects compressor surge has on the turbo, ranging from: So what’s the reality? First of all, engine damage is highly unlikely, unless the turbo fails catastrophically and sends bits of compressor through the engine, but even then it would have to make it through the intercooler first.

What causes a ship’s turbocharger to start racing?

Due to bad weather the engine suddenly starts racing and sudden load change takes place. This happens because during bad weather or pitching the propeller moves in and out of the water, causing the change in load on the engine. Chocked exhaust and air passage like scavenge ports, valve or air cooler etc.