Saint Petersburg, Russia
Saint Petersburg, Russia

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Merkulov O.,RSC Applied Chemistry | Zherebtsov V.,RSC Applied Chemistry | Peganova M.,RSC Applied Chemistry | Kitanin E.,Saint Petersburg State University | And 2 more authors.
SAE International Journal of Aerospace | Year: 2011

Fuel on-board dehydration during flight technologies have been modeled and experimentally studied on a laboratory testing setup in normal specific gas flow rates range of 0.0002-0.0010 sec-1. Natural air evolution, ullage blowing and fuel sparging with dry inert gas have been studied. It has been shown that natural air evolution during aircraft climb provides a significant, substantial, but insufficient dehydration of fuel up to 20% relative. Ullage blowing during cruise leads to a constant, but a slow dehydration of fuel with sufficient column height concentration gradient. Dry inert gas sparging held after the end of the natural air evolution or simultaneously with natural air evolution provides rapid fuel dehydration to the maximum possible values. It potentially may eliminate water release and deposition in fuel to -50°C. It has been found that for proper dehydration, necessary and sufficient volume of dry inert gas to volume of fuel ratio is about 1. © 2011 SAE International.

Gaidei T.P.,RSC Applied Chemistry | Kokorin A.I.,RAS Semenov Institute of Chemical Physics | Pillet N.,French National Center for Space Studies | Sadov V.N.,RSC Applied Chemistry | And 4 more authors.
Russian Journal of Applied Chemistry | Year: 2010

Data of activity of rhodium catalysts prepared on different carriers in reactions of nitrous oxide decomposition is presented; this data gave the possibility to choose the most promising carrier for the elaboration of the catalyst of nitrous oxide decomposition and to use it in high energy plants such as micro rocket engines of space shuttles management systems. © 2010 Pleiades Publishing, Ltd.

Zherebtsov V.L.,RSC Applied Chemistry | Peganova M.M.,RSC Applied Chemistry
Fuel | Year: 2012

The knowledge of water solubility versus temperature in jet aviation fuels is very important for water management in fuel systems of the aircraft. Experimental results have been obtained for three batches of one grade fuel T-1. The difference in water solubility could be explained by slight difference in fuel batches hydrocarbon composition and by the presence of natural surfactant traces. It has been shown that water solubility and temperature relationship may vary for the temperatures below and above zero likely of discontinuous change in entropy and enthalpy during first-order water/ice phase transition. The comparison of experimental and early published 2550 years ago data shows that despite the relevance of the previously obtained data nevertheless, they need to be confirmed. © 2012 Elsevier Ltd. All rights reserved.

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