Investigation of air solubility in jet A fuel at high pressures

The solubility and density properties of saturated mixtures of fuels and gases were measured. The fuels consisted of Jet A and dodecane, the gases were air and nitrogen. The test range included pressures of 1.03 to 10.34 MPa and temperatures of 298 to 373 K. The results were correlated successfully, using the Soave equation of state. Over this test range, dissolved gas concentrations were roughly proportional to pressure and increased slightly with increasing temperature. Mixture density was relatively independent of dissolved gas concentration

Elimination of dissolved gases in hypergolic engine propellants

Exposure to ultrasonic vibration eliminates dissolved gases in hypergolic propellants. A manometer connected to the ullage of the propellant container measures the volume of gases freed

Thermodynamics of sustaining gases in the roughness of submerged superhydrophobic surfaces

Rough surfaces submerged in a liquid can remain almost dry if the liquid does not fully wet the roughness and gases are sustained in roughness grooves. Such partially dry surfaces can help reduce drag or enhance boiling. Gases sustained in roughness grooves would be composed of air and the vapor phase of the liquid itself. The thermodynamics of sustaining vapor was considered in a prior work [Patankar, Soft Matter, 2010, 6:1613]. Here, the thermodynamics of sustaining gases (e.g. air) is considered. Governing equations are presented along with a solution methodology to determine a critical condition to sustain gases. The critical roughness scale to sustain gases is estimated for different degrees of saturation of gases dissolved in the liquid. It is shown that roughness spacings of less than a micron are essential to sustain gases on surfaces submerged in water at atmospheric pressure. This is consistent with prior empirical data.Comment: 15 pages, 6 figure

RRS James Cook Cruise 30, 26 Dec 2008-30 Jan 2009. Antarctic Deep Water Rates of Export (ANDREX)

This report describes scientific activities on RRS James Cook cruise 30, “ANDREX”, westwards from 30°E and in the vicinity of latitude 60°S, between late December 2008 and late January 2009. The cruise was terminated about halfway through by a medical emergency. Hydrographic work comprised 27 CTD/LADCP stations. Water samples were captured for measurement of salinity, dissolved oxygen, inorganic nutrients, oxygen isotope fraction, chlorofluorocarbons and sulphur hexafluoride, dissolved inorganic carbon and alkalinity, helium / tritium / noble gases and radiocarbon. Underway measurements comprised navigation, currents (ADCP), meteorology, and sea surface temperature and salinity. The remainder of the hydrographic section was executed a year later on RRS James Clark Ross, cruise JR239

Technique for determining gases dissolved in fuels, oxidizers, and liquids in general

Technique for determining dissolved pressuring gases in liquid oxidizers and fuel

Анализ проблем, возникающих при интерпретации результатов хроматографического анализа растворенных в масле газов

The article describes the main problems of interpretation of the results of chromatographic analysis of dissolved gases in oil, including the factors of the analyzed that influence the accuracy of the diagnosis of the results of dissolved gas in the oil. The basic directions of improving the reliability of the interpretation of the results of chromatographic analysis of dissolved gases in the oil of formulated.В статье рассмотрены основные проблемы интерпретации результатов хроматографического анализа растворенных в масле газов, в том числе факторы, которые влияют на достоверность диагноза, поставленного по результатам анализа растворенных в масле газов. Сформулированы основные направления повышения достоверности интерпретации результатов хроматографического анализа растворенных в масле газов