问题详情

* 已知管内水流流动处于紊流粗糙管阻力平方区(粗糙区),此时,若增大流量,则管路沿程损失 hf 与沿程损失系数 λ 的相应变化为    。


A、<span style="font-size:16px;font-family: &#39;Times New Roman&#39;,&#39;serif&#39;">h<sub>f</sub></span><span style="font-size:16px;font-family:宋体">与</span><span style="font-size:16px;font-family:&#39;Times New Roman&#39;,&#39;serif&#39;">λ</span><span style="font-size:16px;font-family:宋体">都增大</span>

B、<span style="font-size:16px;font-family: &#39;Times New Roman&#39;,&#39;serif&#39;">h<sub>f</sub></span><span style="font-size:16px;font-family:宋体">与</span><span style="font-size:16px;font-family:&#39;Times New Roman&#39;,&#39;serif&#39;">λ</span><span style="font-size:16px;font-family:宋体">都减小</span>

C、<span style="font-size:16px;font-family: &#39;Times New Roman&#39;,&#39;serif&#39;">λ</span><span style="font-size:16px;font-family:宋体">不变,</span><span style="font-size:16px;font-family:&#39;Times New Roman&#39;,&#39;serif&#39;">h<sub>f</sub></span><span style="font-size:16px;font-family:宋体">增大</span><span style="font-size:16px;font-family:&#39;Times New Roman&#39;,&#39;serif&#39;">&nbsp;</span>

D、<span style="font-size:16px;font-family: &#39;Times New Roman&#39;,&#39;serif&#39;">λ</span><span style="font-size:16px;font-family:宋体">减小,</span><span style="font-size:16px;font-family:&#39;Times New Roman&#39;,&#39;serif&#39;">h<sub>f</sub></span><span style="font-size:16px;font-family:宋体">不变</span>

时间:2021-07-17 23:36 关键词: 给排水工程技术 高起专 水泵风机与站房 2019级第三学期期末考试 给排水科学与工程 专升本 2019级毕业清考(考试分) 清考

答案解析

C