hydraulic resistance

Pressure distributive pipelines with path distribution of fluid are part of various technical systems. Pressure losses at abrupt and smooth pipe reductions are components of total pressure losses in these pipelines. After all, the equalization of fluid distribution along the length of distributive pipelines is achieved, in particular, by reducing their diameter in the direction of flow. Depending on the configuration of the pipe reductions, pressure losses at this pipeline element can vary.

The accuracy of water flow rate measurement with an ultrasonic flow meter (UFM) is affected by pipeline conditions. On water pipelines, there is often no the required length of direct section, required by the device passport or regulatory documents. Therefore, we conducted experiments using UFM to measure water flow rate in the zone of influence of non-direct sections of the water pipeline. The flow rate was measured in two planes of the pipeline with an offset of 90 o and the average value was taken.

At present, the problem of air pollution is a serious environmental problem that negatively affects the living conditions and health of people. The composition of atmospheric air in large industrial and urban agglomerations depends on the type of production and the level of its technology. A promising method of improving dust collectors is the creation of dust collectors, where the principles of operation of several devices are implemented.

Goal. The problem can be solved in research by studying the effect of the ratio of the volume of gas passing through the dust unloading holes to the amount of gas passing through the tangential inlet to the hydraulic resistance and cleaning efficiency in the cyclone with intermediate removal of precipitated dust.

Goal. The problem in research work can be solved by using of experimental research of dependence of hydraulic resistance of a cyclone on expenses of a gas stream and geometrical parameters of the device. Actuality of the work is to optimize the design of a direct-flowing cyclone with a coaxial inset according to the hydraulic characteristics of the device.

Goal. Stated problem in scientific article could be solved by computer modeling of gas stream motion in working area using CFD - programs. Knowledge about structure of gas stream and the trajectory of motion of dust particles afford us to evaluate the efficiency of its work and optimize the design of apparatus. Significance of work consists in evaluation of efficiency of work of cleaning apparatus using CFD - programs. Experiments that is conducted using CFD - programs considerably accelerate the process of researches and are cheaper.