а это что за нах?

[CorrAnt]

увидел такую вот штуковину. Интересно, зачем нужны эти дырки по окружности?

 

[ewgen]

может, что б завывать аки Мессер Шмидт при пикировании?))))

 

[VR6 Glock]

знаю умное слово... антисердж

 

[CorrAnt]

аааааа.... surge limit, антипомпаж.... т.е этт специально для лахов, которые турбы не умеют подбирать или это какая-то приблуда для работы турбы в критических режимах....????

 

[MAK]

Санта, ну напиши=)) Что ты мне говорил про двойной подхват, я кстати чёт сам заленился искать. Всё что помню, было написано more air flow )))

 

[WereRat]

Призрак Гугля шепчет мне...

знаю умное слово... антисердж

Surge Line

* Surge is the left hand boundary of the compressor map. Operation to the left of this line represents a region of flow instability. This region is characterized by mild flutter to wildly fluctuating boost and “barking” from the compressor. Continued operation within this region can lead to premature turbo failure due to heavy thrust loading.
* Surge is most commonly experienced when one of two situations exist. The first and most damaging is surge under load. It can be an indication that your compressor is too large. Surge is also commonly experienced when the throttle is quickly closed after boosting. This occurs because mass flow is drastically reduced as the throttle is closed, but the turbo is still spinning and generating boost. This immediately drives the operating point to the far left of the compressor map, right into surge.

Surge will decay once the turbo speed finally slows enough to reduce the boost and move the operating point back into the stable region. This situation is commonly addressed by using a Blow-Off Valves (BOV) or bypass valve. A BOV functions to vent intake pressure to atmosphere so that the mass flow ramps down smoothly, keeping the compressor out of surge. In the case of a recirculating bypass valve, the airflow is recirculated back to the compressor inlet.
* A Ported Shroud compressor (see Fig. 2) is a feature that is incorporated into the compressor housing. It functions to move the surge line further to the left (see Fig. 3) by allowing some airflow to exit the wheel through the port to keep surge from occurring. This provides additional useable range and allows a larger compressor to be used for higher flow requirements without risking running the compressor into a dangerous surge condition. The presence of the ported shroud usually has a minor negative impact on compressor efficiency.

http://www.turbobygarrett.com/turbobygarrett/tech_center/turbo_tech103.html