نتایج جستجو برای: jet pump
تعداد نتایج: 99772 فیلتر نتایج به سال:
We compare three schemes for time-resolved X-ray diffraction from protein nanocrystals using an X-ray free-electron laser. We find expressions for the errors in structure factor measurement using the Monte Carlo pump-probe method of data analysis with a liquid jet, the fixed sample pump-probe (goniometer) method (both diffract-and-destroy, and below the safe damage dose), and a proposed two-col...
Metastable helium molecules generated in a discharge near a sharp tungsten tip immersed in superfluid 4He are imaged using a laser-induced-fluorescence technique. By pulsing the tip, a small cloud of He(2*) molecules is produced. We can determine the normal-fluid velocity in a heat-induced counterflow by tracing the position of a single molecule cloud. As we run the tip in continuous field-emis...
In this study, an annular jet pump optimization method is proposed based on RBF (Radial Basis Function) neural network model and NSGA-II (Non-Dominated Sorting Genetic Algorithm) algorithm to improve the hydraulic performance of applied in submarine trenching dredging. Suction angle, diffusion area ratio flow were selected as design variables. The computational fluid dynamics (CFD) was used for...
When a pump is propelled by propeller, the nozzle flooding of jet wake area will produce turbulent quasi-sequence structure and have certain impact on outflow field thrust characteristics water propulsion pump. In this paper, method that combined numerical simulation with vortex dynamics adopted, which analyzes dynamic influence A large eddy turbulence model dimensionless velocity coefficient w...
High-speed water jets are key technologies for increased production efficiency in oil drilling, and high-speed self-excited oscillating pulsed (SEOPWs) offer many advantages compared to continuous most industrial applications. Therefore, studies have focused on this topic. However, the current hydraulic rarely extended integrated modeling of jet transmission process. To better apply SEOPWs, bas...
Serial femtosecond crystallography (SFX) using X-ray free-electron laser sources is an emerging method with considerable potential for time-resolved pump-probe experiments. Here we present a lipidic cubic phase SFX structure of the light-driven proton pump bacteriorhodopsin (bR) to 2.3 Å resolution and a method to investigate protein dynamics with modest sample requirement. Time-resolved SFX (T...
The DLR LUMEN (Liquid Upper stage deMonstrator ENgine) rocket engine comprises of two separate turbopumps, one each for Liquid Oxygen (LOX) and Liquified Natural Gas (LNG) supply. In both an identical bearing block separates the pump section from turbine section. current design, features oil-jet lubrication system to cool lubricate bearings during operation. Cryogenic conditions at pump-interfa...
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