The purpose of this chapter is to present the high pressure and temperature liquid oxygen static bubble point experiments to examine the key parameters which affect the bubble point pressure for screen channel LADs inside a high-pressure cryogenic propellant tank. Two fine mesh Dutch Twill screens (200 × 1400 and 325 × 2300) are tested across a wide range of liquid temperatures (92 K < T < 30 K) and pressures (0.138 MPa < P < 1.79 MPa) using both a non-condensable helium and condensable gaseous oxygen (GOX) vapor. Specifically, high-pressure testing capability allows detailed assessment of the importance of subcooling the liquid on LAD performance and the additional associated heat transfer effects that arise due to high pressure and due to different pressurant gases in contact with the screen. Basic image analysis of the screens at LAD breakdown is also performed, to compare performance between the two pressurant gases.
