Accession Number : AD0475197


Title :   AN EXPERIMENTAL INVESTIGATION OF COOLING OF A LOW PRESSURE, LOW TEMPERATURE AIRSTREAM USING LIQUID AIR INJECTION


Descriptive Note : Technical rept. 22 Jul-24 Aug 1965


Corporate Author : ARO INC ARNOLD AFS TN


Personal Author(s) : Sola, J M ; Lazalier, G R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/475197.pdf


Report Date : Dec 1965


Pagination or Media Count : 55


Abstract : An investigation was conducted to determine the feasibility of producing a low temperature, uncontaminated airstream by injection of liquid air into a primary airstream. Steady-state data were obtained with primary airflow conditions generally set at total pressures from 2.5 to 5 psia and supply air temperatures ranging from 380 to 540 R. Liquid airflow rates ranged from 0 to 13.5 lb/sec. Temperature drops of the primary airstream up to 85 R were recorded with liquid air-to-primary air ratios up to 0.146. Calculated cooling efficiencies ranged from 75 to 100%. Gas samples obtained in the mixing chamber at locations 10 and 24 ft downstream from the injection station indicated that the gas flow was a homogeneous mixture with the O2 and N2 content of the gas samples dependent upon the proportions injected.


Descriptors :   *ALTITUDE CHAMBERS , *COOLING , AIR , AIR COOLED , EXPERIMENTAL DATA , FEASIBILITY STUDIES , FLUID FLOW , GAS FLOW , INJECTION , JET MIXING FLOW , LIQUEFIED GASES , MIXTURES , NITROGEN , OXYGEN , PERFORMANCE(ENGINEERING) , PRESSURE , TEMPERATURE


Subject Categories : Air Condition, Heating, Lighting & Ventilating
      Test Facilities, Equipment and Methods


Distribution Statement : APPROVED FOR PUBLIC RELEASE