New formulae for efficiency scaling-up from model to prototype of a hydraulic turbine are presented based on the theoretical analysis that considers the only friction losses through the turbine. Two formulae are presented; one is the precise conversion formula, and the other the simplified ...
The measured turbine efficiency curve is then compared with the curve provided by the manufacturer. The CFD calculations including the spiral case are then used to analyze the influence with the coefficient and index in the Winter Kennedy flow rate formula on the flow rate measurement. The ...
The minimum level would be governed by operating requirements and by the economic balance between the value of the developed head at the site and at the downstream places.The relation between draw down and minimum head should be such that a reasonable turbine efficiency will be maintained through...
Evaluation of the turbine efficiency for the whole range of admissible discharge and head was, and still is, the standard experimental investigation on model turbines in order to predict the performances of the real size machine. The resulting efficiency “hill chart” usually displays a peek effici...
The driver of the pump, which may be an electric motor, a turbine, or a diesel engine, must provide enough power to the pump. Based on the driver efficiency, its power will be more than the pump power calculated. An electric drive motor may have an efficiency of 95%, which can be ...
A hydraulic fluid comprises from 10 to 99% by weight of an ester or mixture of esters, having the general formula: ##EQU1## and/or WHEREIN R is a straight or branched chain alkylene group containing at least 2 carbon atoms, each R 1 is the same or different and is an alkyl radical...
situation will cause more hydraulic loss and should be avoid during runner bucket optimum design process. The torque generated by runner and pressure distribution in the bucket can be calculated based on CFD analysis results. Turbine output and efficiency is finally predicted for various operating ...
The turbine part of the turbo captures exhaust energy of the engine which would otherwise be wasted as heat and sound, and stores it as electrical energy. When extra power is required, the motor- generator powers the compressor to allow an increased mass of fuel/air mixture to be supplied ...
With this objective, we may suppose that at full loading the efficiency of the transformation of hydraulic energy into electrical energy is the product of the efficiency of the electromechanical stage (varying between 0.85 and 0.90, slightly less than that of the turbine) times the efficiency of ...
The FEM is a powerful method for solving problems in structural dynamics, but for FSI problems, it suffers the low calculation efficiency. The aircraft hydraulic pipeline system has long span and complex characteristics. In practical engineering applications, the hybrid method may be a new direction...