答案对不上
在巷道某点上测得静压P=770.0mmHg,该点风速v=5m/s,空气密度 ,则该点的全压为[ ]。(.D);A. 10568.6Pa;B. 10468.6Pa;C. 10368.6Pa;D.10268.6Pa;
解:P全—全压
P静—静压770mmHg=770×133.32=102656.4Pa
H动—动压
V—风速5m/s
—空气密度1.293kg/m³
H动=½V2=0.5×1.293×25=16.1625Pa
P全=P静+h动=102656.4+16.1625=102672.6Pa
该点的全压为102672.6Pa
