Question

when a laboratory test was carried out on a pump, it was found that, for a pump total head of 36m at a discharge of 0.05cubic meters per second, cavitation began when the sum of the static pressure plus the velocity head at inlet was reduced to 3.5m. the atmospheric pressure was 750mmHg and the vapor pressure of water was 1.8kPa. if the pump is to operate at a location where atmospheric pressure is reduced to 620mmHg and the vapour pressure of water is 830Pa, what is the value of the cavitation parameter when the pump develops the same total head and discharge? is it necessary to reduce the height of the pump above the supply, and if so by how much?

Answer 1

urm Berno t1 o062 36 &30 8- 432-0816-6. 3 6 Pvmp 8.432-0.0846-6 losよ 0a212