STUDIES REFER TO LIQUID OXYGEN AREA OF LIQUID-BASED ROCKET ENGINE FUEL SYSTEMS
Journal: REFRIGERATION ENGINEERING AND TECHNOLOGY (Vol.51, No. 4)Publication Date: 2015-08-10
Authors : Yu. Mitikov; M. Voloshin;
Page : 60-64
Keywords : Upper oxygen layer heating; hot helium; aero dynamical heating; absence of correlation.;
Abstract
Hot helium temperature influence on liquid oxygen tank heating process during aero-dynamic heating has been investigated on practice. Tank diameter is 1.25 meters. Tank is made of aluminum alloy. Its upper and down bottoms are heat insulated, internal area is processed with chemical milling. The helium was input into tank center as stream. Aero-dynamic heating was simulated by nitrogen. It was input into annular gap between cylindrical wall and special cover. The value of specific thermal flow was controlled by amount of nitrogen. A time delay with opened drain valve was done after tank fill-up had been finished in order to stabilize fuel component temperature in tank, and tank structure. A tank was refilled to a needed level in case necessity had arisen. The tank pressurization using helium had been done to 3 bar value before oxygen sink. Some investigations were performed with some equal conditions with zero influence ? when pressurization gas temperature was close to oxygen temperature inside tank. Oxygen temperatures were measured in different tank height, and in service manifold. A core with 23 temperature detectors was placed inside the tank. Sink time ~ 150 sec. High layer oxygen temperature detection maximum total error was no more than 0.5 K. The correlation absence between input helium temperature in 90-370 K range, and upper oxygen layer in tank heating using higher than 4 kw/m2 outer heat flows to cylindrical tank part was detected. Upper oxygen layer top heat was less than 4 K in testing conditions, gas pressure inside tank ? less than 1.9 bars. It is worth using simplified process models which are taking aero dynamical heating into account only, during oxygen heating process mathematical modeling.
Other Latest Articles
- INVESTIGATIONS OF EXERGY EFFECTIVENESS AND WAYS OF ENERGY SAVING OF AIR CONDITIONING SYSTEM FOR OPERATING CLEANROOMS
- ENVIRONMENTAL PROTECTION AGAINST CARCINOGENS RESIN AT IGNITION OF HEATING SYSTEMS
- COMPARATIVE ANALYSIS OF THE MAIN PARAMETERS AND RELIABILITY INDICATORS OF SINGLE-STAGE THERMOELECTRIC COOLING DEVICES WHILE USING DIFFERENT COMBINATIONS OF INITIAL MATERIALS SETTINGS OF A SIMILAR EFFICIENCY
- SIMULATION OF AIR DISTRIBUTION RATE IN REFRIGERATING CONTAINER REFRIGERATION UNIT EVAPORATOR COMPARTMENT
- FLUIDS BULK VISCOSITY: CURRENT PHYSICAL AND ANALYTICAL CONCEPTIONS AND PROSPECTS OF THEIR DEVELOPMENT
Last modified: 2015-09-20 04:27:59