During past year , 28 times of measurements for two units of b plant of zhelin hydropower station were made , the states of pressure pulsation in the draft cone tube , head cover and spiral case of units were acquired under different water heads , and the influences of that on safety and stability of units operations were also acquired 摘要在長達(dá)一年多的時(shí)間里,對柘林水電廠b廠兩臺機(jī)組進(jìn)行了28臺次試驗(yàn),全面掌握了機(jī)組各水頭下尾水錐管、頂蓋和渦殼中的壓力脈動情況,以及對機(jī)組安全穩(wěn)定運(yùn)行的影響。