The CFD analysis of main valve flow field and structural optimization for double-nozzle flapper servo valve

Double-Container Gas Fuel Control Valve: Numerical Analysis and Operating Conditions

“…They initially used the standard k-ε model, and predict higher levels of turbulent kinetic energy, finally adopted the realizable k-ε model for turbulence closure. Peng et al (2012) used FLUENT to simulate the flow through a double-nozzle flapper main valve and servo valve. The simulation was for the main valve spool on a certain position.…”

CFD analysis of the characteristics of a proportional flow control valve with an innovative opening shape

“…On the other hand, Bing in [6] provides several guidelines for modifying three-stage directional spool valve geometry in order to obtain a faster response and thus larger transient flow, while Simic in [7] optimised the spool and housing geometry of a small hydraulic seat valve in order to reduce axial flow forces. The optimisation of spool geometry in a double-nozzled flapper servo valve was also carried out by Peng et al [8]. However, in that case the main purpose of the optimisation was to reduce the probability of occurrence of cavitation.…”

Study on the Performance and Control of a Piezo-Actuated Nozzle-Flapper Valve with an Isothermal Chamber

“…Kawashima et al [6] designed and manufactured a new NF valve to minimize noise level and pressure fluctuations in the output flow of the valve. There have also been some research works that studied NF valves numerically to optimize their dimensional features [7] or suggested new structures to decrease detrimental effects of the output flow on it [8]. The load chamber is one of the main subdivisions of the NF valve, and its dynamics have an important role in the whole dynamic of the valve.…”