Fluid Flow in the Throttle Channel in the Presence of Cavitation

Experiment and numerical simulation investigation on cavitation evolution and damage in the throttling section of pressure reducing valve

“…A large number of literature studies show that the pressure drop of the pressure‐reducing valve is mainly accomplished by the narrow throttling section; when the pressure after throttling is lower than the saturated vapor pressure, cavitation will be induced. Therefore, cavitation generally occurs in the low‐pressure region behind the throttling section 9,10 . Most scholars have carried out cavitation research on the throttling section of the pressure‐reducing valve for this phenomenon 11,12 .…”

“…Therefore, cavitation generally occurs in the low-pressure region behind the throttling section. 9,10 Most scholars have carried out cavitation research on the throttling section of the pressure-reducing valve for this phenomenon. 11,12 Han et al 13 numerically investigated the flow rate and cavitation characteristics of three kinds of typical throttling structures of the poppet valves and found that the error is less than 6.5% between the experimentally measured flow rate of the whole throttling valve and the simulated flow rate of the throttling section under different inlet pressure and opening, which shows that the study on the throttling section can replace the study of the whole poppet valve to a certain extent.…”

Calculation of Hydro-Mechanical Losses and Modeling of Cavitation in the Channels of the Hydraulic Unit of a Dump Truck

“…В работе [10] демонстрируется расчетная модель для оценки кавитационно-эрозионных повреждений в соленоидных клапанах дизельного инжектора. Исследователи в работе [11] увеличили сходимость результатов расчета при моделировании процесса кавитации в канале дросселирующего отверстия за счет приближения расчетной модели к реальным условиям работы гидропривода. Авторы работы [12] рассматривают модель процесса кавитации, прогнозирующую рост и схлопывание кавитационных каверн, которая рассчитывает зависящее от времени распределение пара в каждой вычислительной ячейке.…”

A Novel One-Camera-Five-Mirror Three-Dimensional Imaging Method for Reconstructing the Cavitation Bubble Cluster in a Water Hydraulic Valve

“…To the best of our knowledge, fewer studies about bubble morphology in throttle valves have been done, albeit with both the invasive techniques (impedance probe and optical fiber probe) and the non-invasive techniques (PIV, PTV, PT) being prevalent. The non-invasive approach has widely been promoted through high speed photography in bubble measurement studies, inclusive of the 2D bubble columns [2][3][4][5], the channels [6][7][8][9], the flat plates [10], the hydrofoils [11,12], the mixing tanks [13], the liquid-solid interface [14], the dynamically loaded journal bearings [15], the ultrasonic devices [14,[16][17][18], the axisymmetric geometry [10], the throttle orifice, and so on.…”

“…To start with, the first ever experiment on capturing the motion of Helium-filled bubbles in an engine using a single camera and multiple mirrors, was done by Kent and Eaton [19] in 1982. Next, Racca and Dawey [20] implemented a measuring method by using a single high speed cine camera through a split field mirror to track small resin beads (tracers) and Belden et al proposed a "3D synthetic aperture imaging (SA imaging)" by using nine (9) high speed photon cameras to capture the bubbly flow induced by a turbulent circular plunging jet.…”