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Centrifugal Pumps Design and Application 2nd ed - Val S. Lobanoff, Robert R. Ross (Butterworth-Heinemann, 1992)

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Vibration <strong>and</strong> Noise in <strong>Pumps</strong> 489<br />

perature in Figure 18-44. The isothermal tangent bulk modulus has been<br />

shown to be approximately equal to the secant bulk modulus at twice the<br />

pressure within ± 1 %. Pressure compensation for the isothermal secant<br />

bulk modulus can be made by using Figure 18-45,<br />

The isothermal bulk modulus, K T , <strong>and</strong> isentropic bulk modulus, K s ,<br />

are relat<strong>ed</strong> by the following equation:<br />

Figure 18-44. isothermal secant bulk modulus at 20,000 psig for petroleum fractions<br />

|50J.

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