Power the meter scale for measuring the engine exhaust flow research

Abstract: the power meter scale for measuring the engine exhaust flow research information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. As flow rate measuring device for measuring the displacement of the engine power and own design of the flow meter, such as from structural characteristics. Because of the special structure of the design of the flow meter, in fact, it shows that it has other advantages of reliability, precision, high pressure. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the power meter scale for measuring the engine exhaust flow research article details. As flow rate measuring device for measuring the displacement of the engine power and own design of the flow meter, such as from structural characteristics. Because of the special structure of the design of the flow meter, in fact, it shows that it has other advantages of reliability, precision, high pressure, temperature, and corrosion. The engine performance and emissions measurement, one of the need to measure the main parameters of the exhaust flow. However, direct measurement of exhaust gas flow characteristics of engine exhaust gas is more difficult. Displacement to reflect, and under normal conditions of fuel consumption, but the amount of air flow, strictly speaking, measuring exhaust did not take consideration of the leakage of engine, as a result, you may not be accurate. Due to the displacement must be measured directly in general, turbocharged engine continuously in a particular study, exhaust gas recirculation, engine exhaust from dilute measurement, we use the exhaust gas flow meter. It may be the temperature of the idle, first of all, the orifice meter engine exhaust temperature, exhaust, exhaust temperature difference, may be higher than 800 ℃, zui high temperature at full capacity ( At full speed) : engine exhaust flow measurement, the following problems directly, and 150 ℃ when, need to take into account, the exhaust resistance increased, because of increased engine fuel consumption rate, because in the increase of the exhaust gas supply, push power engine second, it is not possible to measure engine displacement is too much, the third resistance, it can be the corrosion of flowmeter has the granular material substance and strong acid, such as the exhaust of engine, and the exhaust gas temperature increase, the worsening emission measurement displacement add meaningless cells may lead to blocking of orifice meters ma or flowmeter, change the status of the engine exhaust gas, and due to the discontinuity in engine exhaust gas, in particular, before the exhaust pressure exhaust fluctuation is large, in particular, there is a kind of exhaust turbocharger and turbo engine. Designed in this paper, the measuring power bar design of flowmeter ( Werabar） Is new, the amount of exhaust gas flow measurement devices of precision. Single power flow meter is the principle of differential pressure. When the fluid flows through the sensor, In the face of the flow direction) At the front, with the power of the flowmeter sensor reading, at the back of the exhaust pipe to produce high voltage setting low pressure and high pressure sensor distribution area in the ordering of the rules of the distribution of more specific ( Usually three pairs) High, measured at the end of the face of the fluid pressure, flow direction of each fluid pressure produced by a point for each pressure tap ( Including is known as the average speed of pressure and static pressure may dynamic pressure) P1 pressure value has been measured. The average fluid more static pressure measurement, * hole in low pressure pickup? 吗? Area ( The downstream direction) , namely the sidewalls of the lower pressure P2. P2 is & Delta; P= P1- The pressure difference between the P2 and P1, was introduced to the differential pressure transmitter, the size of the average velocity, i. e. , analysis of the temperature of fuel tankers metrological verification principle reflects the average flow, pressure & Delta; P is able to estimate the velocity of the fluid. Flow sensor in the production of stainless steel corrosion resistance of the metal, there is a special cross section shape, such as shown in figure 2 is power. Fluid separation point and low pressure at the mouth of the probe, high pressure port, located in the probe? 吗? In front of the lateral sides of the probe. Probe at the front of the metal surface, the surface roughness. According to the principle of aerodynamics, fluid at low speeds, the probe can get a steady flow of fluid through the rough surface, the formation of turbulent boundary layer is stable, help to improve the accuracy of measurement of state at low speed and the proportion of more and more big, the exact differential pressure signal. Power of the flowmeter flow sensor design such a significant attempt, in order to prevent the impact. However, if in hydrostatic pressure pipeline, the flow of the operation of the flow sensor, begin to enter the hollow hole of high pressure probe, formation pressure balance, immediately after, he has formed a state of equilibrium pressure and high pressure port dispatch involute leave toward the sensor probe on both sides of the back of the no input on the formation of the spiral, weave is detected in the entrance of the high pressure fluid. Under normal circumstances, the pellet impurity is concentrated in the lower part of the back, under the action of the probe of the traction of the vortex.

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