by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in Washington, D.C, [Springfield, Va .
Written in English
|Statement||S.D. Rupprecht and G.M. Faeth|
|Series||NASA contractor report -- 3422|
|Contributions||Faeth, G. M, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch, Lewis Research Center|
|The Physical Object|
|Pagination||ix, 102 p. :|
|Number of Pages||102|
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 to MPa and temperatures of to K. An investigation of air solubility in Jet A fuel at high. The investigation is divided into three phases: (1) measure the solubility and density properties of fuel/gas mixtures, including Jet A/air, at pressures and correlate these results using theory; (2) investigate the atomization properties of flashing liquids, including fuel/dissolved gas : G. M. Faeth. An investigation of air solubility in Jet A fuel at high pressures Problems concerned with the supercritical injection concept are discussed. Supercritical injection involves dissolving air into a fuel prior to injection. A similar effect is obtained by preheating the fuel so that a portion of the fuel flashes when its pressure is reduced.
The solubility of air into fuel grows significantly and surface tension goes nearly to zero, meaning that well defined drops are not identifiable; neither is the liquid/gas interface of a jet core. Thermal conductivity and mass diffusivity can vary much more strongly, and the latent heat of vaporization goes almost to zero owing to the practical absence of surface tension. The base fuel (Jet A) was distilled and the ﬁrst weight percent of the overhead (OH) was collected (the distillate is designated wt% OH). The lower ﬂash point ( F) fuel was created by mixing 91 wt% of base fuel with 9 wt% of the overhead ( wt% OH). The resulting fuel blend is designated by the distillate name “ wt%. In nature, high-pressure flows are found in petroleum reservoirs, at ocean depths, and in the atmospheres of planets such as Venus. In industry, the enhanced solubility that occurs at high pressures is used to extract certain chemical species; for example, the solubility of caffeine in supercritical carbon dioxide enables production of. Laminar burning speeds and flame structures of spherically expanding flames of mixtures of acetylene (C 2 H 2) with air have been investigated over a wide range of equivalence ratios, temperatures, and ments have been conducted in a constant volume cylindrical vessel with two large end windows.
Calculate the solubility of \(O_2\) in water at 25°C at an atmospheric pressure of atm. Given: Henry’s law constant, mole fraction of \(O_2\), and pressure. Asked for: solubility. Strategy: Use Dalton’s law of partial pressures to calculate the partial pressure of oxygen. (For more information about Dalton’s law of partial pressures). Indeed, at the triple point the bulk solubility of nitrogen gas in water in terms of mole fractions is only x N 2 E 2 Â 10 À5. 28, 89 This can be compared with an effective solubility of. A good agreement has been shown between the experimental results and the calculated results (See Table A1). Fig. 4 shows that different batches of one grade fuel T-1 have the different water solubility curves. The deviation of the solubility for different curves has the maximum values of % at temperatures below zero, while the deviation for each curve is not more than 12%. Five different SPKs and Jet A-1 were tested at different mass flow rates of air and fuel, and at two different sub-atmospheric air pressures and temperatures. The fuel temperature was kept approximately constant. Simultaneous high-speed imaging of the OH* and CH* chemiluminescence, and of the broadband luminosity was used to visualize both the.