Sizing of a solar-wind hybrid electric vehicle charging station by using HOMER software

Fuel consumption and exhaust emissions of diesel vehicles in worldwide harmonized light vehicles test cycles and their sensitivities to eco-driving factors

Experimental study on puffing and evaporation characteristics of jatropha straight vegetable oil (SVO) droplets

Hydrodynamic cavitation that occurs inside valves not only increases the energy consumption burden of the whole piping system but also leads to severe damages to the valve body and the piping system with a large economic loss. In this paper, in order to reduce the hydrodynamic cavitation inside globe valves, effects of valve body geometrical parameters including bending radius, deviation distance, and arc curvature linked to in/ export parts on hydrodynamic cavitation are investigated by using a cavitation model. To begin with, the numerical model is compared with similar works to check its accuracy. Then, the cavitation index and the total vapor volume are predicted. The results show that vapor primarily appears around the valve seat and connecting downstream pipes. The hydrodynamic cavitation does not occur under a small inlet velocity, a large bending radius, and a large deviation distance. Cavitation intensity decreases with the increase of the bending radius, the deviation distance, and the arc curvature linked to in/export parts. This indicates that valve geometrical parameters should be chosen as large as possible, while the maximal fluid velocity should be limited. This work is of significance for hydrodynamic cavitation or globe valve design. (Less)

A parametric study of hydrodynamic cavitation inside globe valves

Effect of characteristic parameters on the magnetic properties of solenoid valve for high-pressure common rail diesel engine

Effects of structure parameters on the static electromagnetic characteristics of solenoid valve for an electronic unit pump

Effects of structure parameters on flow and cavitation characteristics within control valve of fuel injector for modern diesel engine

Orthogonal Optimum Design of High-Speed Solenoid Valve for the Injection System of Unit Pump

The control valve is an essential component of electronic unit pump (EUP) fuel injection systems; it controls the flow rate with high-precision electrical signals. Thus, high precision and flexibility are required in the working process of a fuel injection system. The flow capacity (indicated by mass flow rate) of a control valve is an important technical indicator in the discharge of EUP fuel injection systems. In this study, the transient flow characteristics within control valve during the discharge of an EUP were evaluated using a computational fluid dynamics (CFD) approach. Three essential structural parameters of EUP control valve were investigated, and their effects on circulation characteristics were evaluated. The variation trends were observed, and the changes in significant physical parameters and crucial physical field distributions were analyzed. During the investigation, the visualization of internal flow of control valve provided more detailed information of flow fields. This study shows the effect of each parameter on flow characteristics and indicates that cavitation is the lowest for the case of 0.20 mm valve core lift; the length of slit is the shortest for the case of 7 mm seal diameter, therefore, the mass flow rate of export is the highest; at 139 deg seal cone angles, fuel velocity is the highest, therefore, 139 deg is the best seal cone angle.

Lan Wang

Papers

Effects of structure parameters on the static electromagnetic characteristics of solenoid valve for an electronic unit pump

Effects of structure parameters on flow and cavitation characteristics within control valve of fuel injector for modern diesel engine

Effect of characteristic parameters on the magnetic properties of solenoid valve for high-pressure common rail diesel engine

Orthogonal Optimum Design of High-Speed Solenoid Valve for the Injection System of Unit Pump

Effects of Control Valve's Structure Parameters on the Circulation Characteristics for an Electronic Unit Pump