Carrying on pulsation principle,the impeller upstream and the downstream static pressure is nearly equal. When fluid through impeller, limestone slab for sale arkansas mainly refers to for the fluid energy in the impeller downstream the useful energy which appears by the kinetic energy form. The fluid flows out from the impeller is a turbulent flow, may by install after the impeller downstream guide vane direct inflow connection diffuser, causes the major part kinetic energy to transform as the static pressure energy which needs. The axialflow ventilator's movement scope is the stall line limit. If surpass this limit, first causes the leaf blade place air current on the necessity to present the local separation. When in the air blower has the ration turbulent flow,limestone slab for sale arkansas on the possibility, namely air draft periodic flowing backwards. works as system's resistance hairs breadth in the performance diagram of curves stall line place above, as a result of unstable appearance, then ventilator impossible in corresponding pressure, current capacity scope operating point movement. If the machine in the non-stability region movement, will cause the leaf blade to have the excitation, will cause the endurance failure.
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