Visualization and Analysis of the Multiphase Flow in an Electromagnetically Driven Dosing Pump

Abstract

Fluids with a high proportion of dissolved air lead to an increased air release in hydraulic components. Looking at the fluid flow in a piston pump, the resulting multiphase flow may affect its metering performance. To improve effects caused by cavitation, it is necessary to detect and analyze all critical flow areas in detail. This paper presents investigations of the multiphase flow in an electromagnetically driven dosing pump. This type of pump is suitable for metering any kind of liquid in motor vehicles in a very precise manner. Using high speed camera equipment and transparent components for the displacement chamber, the presented experimental work gives a comprehensive insight into the most relevant cavitation effects in the pump. In addition, the pressure inside the displacement chamber is measured with the help of a miniature pressure sensor. By combination of measuring data and visual recordings, cavitation phenomena can be determined precisely, so that a profound understanding of the flow behavior in the pump is achieved.

Experimental Study and Influencing Factors Analysis of the Electric Gear Urea Pump Supply Performance

“…Selective Catalytic Reduction (SCR) is widely used in modern diesel engine exhaust NOx control technology [1][2][3][4] . The urea pump, as one of the core components of the SCR system, is responsible for the pressurization, pressure control, and delivery of urea solution [5] . Pan et al analyzed the influencing factors of dynamic characteristics and metering accuracy of a diaphragm urea pump based on test and simulation respectively [6][7] .…”

Prediction of cavitation and induced erosion inside a high-pressure fuel pump

“…There are limited studies available in the literature that discuss the development of two-phase flow in positive-displacement pumps bearing a piston plunger and a separate pressurization chamber, where cavitation can also emerge during the phases of volume expansion. Petzold et al 11 visualized the transient, two-phase flow within a metering pump employing a closed chamber pressurized by a moving piston. Two variations of the configuration were considered, bearing different port-hole designs, in order to verify which one achieved higher dosage accuracy designated by the extent of bubble growth in the pump chamber.…”