Performance Characterization of the TRW 35K Pulse Tube Cooler
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pulse tube cooler characterization thermal perform↗
Engineering topics
Smedley, G.
Publications and source records attributed to Smedley, G..
Cryocooler Electromagnetic Compatibility
Jet Propulsion Laboratory, under joint Ballistic Missile and Defense Organization/Air Force and NASA/Eos Atmospheric Infrared Sounder sponsorship is conducting extensive space cryocooler characterization to provide a reliable and accurate data base on cryocooler performance for use by the space community.
cryocooler electromagnetic compatibility cryocoole↗
Performance Characterization fo the Sunpower Cryocooler
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Sunpower 140K cryocooler↗
Cryocooler Electromagnetic Compatibility
The Jet Propulsion Laboratory, under joint Ballistic Missile and Defense Organization/Air Force and NASA/Eos Atmospheric Infrared Sounder sponsorship, is conducting extensive space cryocooler characterization to provide a reliable and accurate data base on cryocooler performance for use by the space community.
detector↗
Vibration Characteristics of Stirling Cycle Cryocoolers for Space Application
Vibration generated by small Stirling-cycle cryocoolers is an important concern for spacecraft designers planning to incorporate these cryocoolers into near-term space-science instruments.
cryocooler characterization self-generated vibrati↗
Cryocooler Resonance Characterization
This paper presents the fundamental equations governing cyocooler mechanical efficiency and launch vibration response in terms of their implications for cooler design.
cryocoolers↗
Containments for liquids at zero gravity
A theory proposed by Concus and Finn (1974) and recently developed by Finn (1983 and 1984) yields explicit geometrical criteria for the position of the free surface of a liquid at zero gravity in a cylindrical container of specified cross section. These criteria were applied by Concus and Finn to three container geometries: the bathtub, the trapezoid, and the keyhole. It is possible to find geometrical criteria that promise a liquid interface of finite height, with the base still covered with liquid, or a liquid interface of infinite height, with the liquid wetting a well defined portion of the wall. In the present work, calculations are presented for a fourth geometry, the non-concentric cylinders. In addition, the earlier calculations of Concus and Finn are extended, and a unified graphical presentation of all four geometries is given that can be used directly for the design of containments for liquids at zero gravity.
Smedley, G.↗
Preliminary drop-tower experiments on liquid-interface geometry in partially filled containers at zero gravity
Plexiglass containers with rounded trapezoidal cross sections were designed and built to test the validity of Concus and Finn's existence theorem (1974, 1983) for a bounded free liquid surface at zero gravity. Experiments were carried out at the NASA Lewis two-second drop tower. Dyed ethanol-water solutions and three immiscible liquid pairs, with one liquid dyed, were tested. High-speed movies were used to record the liquid motion. Liquid rose to the top of the smaller end of the containers when the contact angle was small enough, in agreement with the theory. Liquid interface motion demonstrated a strong dependence on physical properties, including surface roughness and contamination.
Smedley, G.↗