Test And Research About The Effect On Orifice Spiral Flow Erasing Energy

In the large-scale hydraulic engineering long distance has the pressure water distribution as well as the water, the thermoelectric power station pilots, each kind of hydromass and the material water power transportation, all must depend upon the pipeline,Has the pressure water supply and the drainage channel system, massively exists in the hydraulic engineering and in the industry and agriculture architectural engineering. In the pipeline discharge head, is the conveyance fluid energy, but in some situations, some piping system because of the terrain landform limit, or because of other condition limits, the initial pressure head often surpasses the conveyance fluid consumption the energy, this part of surplus energy like needlessly eliminates, will be able to give the downriver facility to cause the harm. The pipeline disappears can have in the pressure water - carrige system the main constituent, disappears the member, the hydraulic characteristic which can install affect it to disappear directly the energy efficiency.This article has used the orifice spiral eddy disappears can install, Is different the pure orifice which used in the past people disappears can the form, also was different in the pipeline lateral enters the water or installs the spiral eddy which the stator vane the form produced to disappear can the way, it was the manhole jet flow and the spiral class form union, as well as disappeared in the mobile form can in the effect have at the same time the manhole jet flow and the spiral eddy characteristic, was disappears to the spiral eddy can the way one kind of brand-new attempt.This article in the massive physical testing foundation, has studied the pressure distribution, the local resistance coefficient and each part of pressures slope which the orifice spiral eddy disappears can install, analyzed has disappeared can the mechanism and disappears the energy efficiency, the research main content includes:1. Through the different current capacity under, the different orifice quantity, the different reverse angle orifice spiral eddy disappears can install measured respectively presses the cross section the pressure analysis, differently experiments under the plan to disappear can the equipment different part place pressure distribution, the definite orifice place for should disappear can install disappears can the main force area.2. Through to the tentative data analysis, the computation disappears can install disappears respectively can the part disappear can the effect and the local resistance loss coefficient. Confirmed the caliber reduction place local resistance loss coefficient empirical formula, the analysis has obtained suddenly: When the orifice reverse angle increases, this place the local resistance loss coefficient increases gradually, may achieve the reverse angle most greatly for 0°time 4.9 times.3. To the orifice room in front of the orifice position as well as the orifice, the after conduction current hole shear stress and the conduction current hole resistance two parts carry on the analysis, inferred the resistance loss which the orifice brought in the circular pipe spiral eddy, high disappeared for the development the energy efficiency to disappear can install has provided the basis.4. To experiments the current capacity, the Reynold's number, hole parameter and so on slab number, orifice reverse angle carries on the analysis, determined the influence orifice spiral eddy disappears can install disappears can the effect parameter, as well as above parameter cancels can the effect influence, will be the next related series experiment accumulation experience, will put forward the proposal.