Two venturi meters are installed in a \(30-\mathrm{cm}\)-diameter duct that is insulated (Figure P5.8). The conditions are such that sonic flow exists at each throat (i.e., \(M_{1}=M_{4}=1.0\) ). Although each venturi is isentropic, the connecting duct has friction and hence losses exist between sections 2 and 3. \(p_{1}=3\) bar abs. and \(p_{4}=2.5\) bar abs.

If the diameter at section 1 is \(15 \mathrm{~cm}\) and the fluid is air:

(a) Compute \(\Delta s\) for the connecting duct.

(b) Find the diameter at section 4.

Transcribed Image Text:

Figure P5.8 4