Pricha P Klinsuttho

US Patent:

62793853, Aug 28, 2001

Filed:

May 3, 1999

Appl. No.:

9/303742

Inventors:

Arthur A. Krawetz - Evanston IL
Phat A. Phan - Skokie IL
Pricha Klinsuttho - Elmwood Park IL

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G01N 1100
G01N 1108

US Classification:

73 5301

Abstract:

A method to measure both the isothermal secant and tangent bulk modules and the density of functional fluids. The instrumentation and methodology described in this invention use much smaller volumes of fluids which permits the measurement of these critical properties on experimental fluids which are available in only limited quantities.

US Patent:

53833520, Jan 24, 1995

Filed:

Jan 26, 1994

Appl. No.:

8/188169

Inventors:

Arthur A. Krawetz - Evanston IL
Pricha Klinsuttho - Darien IL
Phat A. Phan - Skokie IL
Quyet Phung - Orange CA

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G01N 3328
G01N 1104

US Classification:

73 5401

Abstract:

A method is disclosed for determining bulk modulus of a liquid based on a pressure-volume-temperature relationship at constant volume corrected for changes in system volume due to elevated pressure and temperature. The apparatus used to determine bulk modulus comprises a pressure vessel in which the liquid to be tested is introduced, and from which all gases are removed. The vessel is placed in a constant temperature oven and the pressure is recorded. The method for determining bulk modulus and density requires calibration of the vessel volume changs due to pressure and temperature. The method for determining isothermal bulk modulus requires the solution of an empirical equation: ##EQU1##.