Numerical Simulation And Experimental Research On The Self-excited Inspiration Pulsed Liquid-gas Jet Nozzle

Aiming to deal with the problem of deepwater reservoir bottom sediment, this paper proposed a new self-excited pulsed liquid-gas jet nozzle suction to deal with the issue of deep water sedimentation based on summarizes a lot of relevant literature, and numerical simulation of internal flow,through laboratory tests to get its impact and inspiration performance changes with parameters,through field test to get suspended height and transport distance of sediment under the effect of the liquid-gas jet.The results providing technical support for the self-excited pulsed liquid-gas jet suction technology in reservoir dredging in actual project.Chapter one overviews the domestic and foreign research profiles,describes the purpose and significance of research and study of this article, briefly introduce Self-e xcited domestic and foreign progress and application of pulse jet technology and rese rvoir dredging technology. The second chapter is the theoretical study of the self-exc ited breathing pulse jet, analyzes theoretically self-excited pulsed jet suction generati ng mechanism and the mechanism of self-suction process and erosion principle selfexcited inhaling and pulsing liquid-gas jets.Chapter III numerical the self-excited in t he underwater breathing pulse jet nozzle gas-liquid two-phase flow by useing the Eul er liquid gas two-phase flow model,got the inside nozzle flow velocity distribution, p ressure distribution and gas volume distribution and studied the two-phase mixing w ater suction gas equipment. Chapter IV through laboratory tests, this paper tests the impact performance and erosion performance of the nozzle under simulated depth of 10 m ~ 50 m conditions, explores the variation and radial energy distribution of liquid-gas jet under different water depth, elaborats further erosion mechanism; Through field testing, observated and tested the erosion effect of self-excited breathing pulse jet nozzles, and preliminary analysis the action mechanism of the liquid-gas jet on the sand bed.