Table of Contents
What causes compressor surge under load?
This is called the ‘surge’ line, and forcing the turbocharger to operate to the left of this line causes ‘compressor surge’. When your turbocharged engine is under load, the engine is consuming air (airflow), and your turbo is creating pressure (boost).
What is compressor surge in a turbo?
In simple words, a big mass of oscillating airflow can cause vibration of the turbo compressor impeller and its vanes, which make the compressor unable to operate normally, producing a high pitch noise as a reaction, which is known as compressor surge.
Is compressor surge bad for turbo?
Since the turbo is actually making significant boost, is at high RPM, and the pressure is fluctuating wildly because of the surge, these conditions do have the potential to cause greatly accelerated turbo bearing wear and/or damage to the compressor wheel.
Does turbo flutter damage the turbo?
When the compressed air has nowhere to go, it causes the turbo rotational speed to rapidly drop, and attempts to push against the wheel. This can cause premature wear on your turbo, however closed throttle flutter on modern turbochargers is unlikely to cause a noticeable drop in turbocharger lifespan.
Is compressor surge bad for a turbo?
What happens when a compressor surges?
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.
Is flutter bad for turbo?
How do you detect a compressor surge?
As mentioned previously, compressor flow, discharge pressure, and inlet temperature are signals that can be used for surge detection. However, based on experience, suction pressure can also exhibit surge induced oscillations.
Can compressor surge damage a turbo?
What makes a turbo whistle?
What causes turbo whistle? Turbo whistle is the sound of the compressor inside the turbocharger speeding up (also known as ‘spooling up’, which is why it kicks in at the boost threshold (when the turbo starts to kick in) as you accelerate up the rev range.
What happens during compressor surge?
Surge is a condition that occurs in compressors when the amount of gas they are trying to compress is insufficient for the size of the compressor and the blades lose their ability to transfer energy from the shaft to the fluid, causing a reverse flow of the gas.
What makes a car go Stutututu?
When there is vacuum (no boost) in the intake manifold relative to the rest of the intake system, the BOV opens. It’s the BOV that makes the signature turbo sound (“pssst”; “sutututu”), not the wastegate.
What is compressor surge?
Compressor surge is a form of aerodynamic instability in axial compressors or centrifugal compressors.The term describes violent air flow oscillating in the axial direction of a compressor, which indicates the axial component of fluid velocity varies periodically and may even become negative.
How do you identify compressor surge?
In early literature, the phenomenon of compressor surge was identified by audible thumping and honking at frequencies as low as 1 Hertz, pressure pulsations throughout the machine, and severe mechanical vibration. Compressor surge can be classified into deep surge and mild surge.
Is compressor surge axisymmetric?
Violent flows of compressor surge repeatedly hit blades in the compressor, resulting in blade fatigue or even mechanical failure. While fully developed compressor surge is axisymmetric, its initial phase is not necessarily axisymmetric.
Is surge a dead-end for natural gas compressors?
Without a doubt, Surge might create a dead-end for natural gas compression. On the other, surge represents a point at which the compressor will no longer be able to supply energy to the gas to push through the compressor and further through the check valve to the discharge piping section. It is an unstable operating condition.