Consider a venturi with a small hole drilled in the side of the throat. This hole is connected via a tube to a closed reservoir. The purpose of the venturi is to create a vacuum in the reservoir when the venturi is placed in an airstream. Consider a venturi with a small hole drilled in the side of the throat. This hole is connected via a tube to a closed reservoir. The purpose of the venturi is to create a vacuum in the reservoir when the venturi is placed in an airstream.
Consider a venturi with a small hole drilled in the side of the throat. This hole is connected via a tube to a closed reservoir. The purpose of the venturi is to create a vacuum in the reservoir when the venturi is placed in an airstream. (The vacuum is defined as the pressure difference below the outside ambient pressure.) The venturi has a throat-to-inlet area ratio of \(0.85\). Consider a venturi with a small hole drilled in the side of the throat. This hole is connected via a tube to a closed reservoir. The purpose of the venturi is to create a vacuum in the reservoir when the venturi is placed in an airstream.
Venturi has a throat area ratio of 0.85.We need to calculate here the maximum vacuum obtainable in the reservoir when the venturi is placed in an airstream of \(90\;m/s\).
\[P_{1}-P_{2}=\frac{1}{2}\rho V_{1}^{2}\left [ \left ( \frac{A_{1}}{A_{2}} \right )^{2}-1 \right ]
\\=\frac{1}{2}\left ( 1.23 \right )\left ( 90 \right )^{2}\left [ \left ( \frac{1}{0.85} \right )^{2}-1 \right ]
\\=1913\;N/m^{2}\]
