Abstract To explore the noise problem of solenoid valve in pressurized water-air system a pumped storage power station when operating under discharge condition, full-channel unsteady numerical simulation was carried out on medium-pressure gas tank and its facilities. Firstly, large eddy (LES) method used to calculate sound source, then finite element (FEM) solve internal field. The flow field d...

The China Fusion Engineering Test Reactor (CFETR), a superconducting magnetic confinement tokamak fusion reactor, will develop high-performance torus cryopump to pump plasma exhaust gas. inlet valve is one of the key components cryopump, and it used isolate from for regeneration, control pumping speed operate as pressure relief in case failure, such cryopipe breaking inside chamber. This paper ...

Turbocharging is becoming a key technology for both Spark Ignition (SI) and diesel automotive engines. As regards gasoline engines, turbocharging can help to reduce CO2 emissions when used in conjunction with other technologies, such as engine downsizing, direct injection and variable valve actuation, all managed on the basis of appropriate control strategies. However, the successful applicatio...

Valve as an important part of the gas distribution mechanism, is crucial engine. When engine works, valve subjected to high temperature, impact, frictional wear and corrosion other harsh working conditions, reliable durable has impact on safety reliability In this paper, a model four-stroke marine diesel used research object, intake set exhaust models are established respectively. Heat transfer...

This experimental work was concerned with comparison of inlet valve actuation strategies in a thermodynamic single cylinder spark ignition research engine equipped with a mechanical fully variable valvetrain on both the inlet and exhaust. The research involved study of the effects of the valvetrain on combustion, fuel economy and emissions when used to achieve variable valve timing alone and wh...

In the pneumatic driving system for a soft mechanism, control valve is most heavy and expensive device. To realize compact inexpensive system, it necessary to reduce size, weight, cost of valve. previous study, low-cost 4-port servo that could flow rate by changing bending angle buckled tubes was proposed tested. However, tube in became least durable component. The speed at which altered affect...