Download or read book THERMAL STABILITY OF HYDROCARBON FUELS written by G. D. KITTREDGE and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research was conducted to: (1) develop a small scale jet fuel thermal stability tester capable of operation at fuel temperatures from 300 to 650 F with samples 1 qt or less in size, and (2) study the effects of storage on thermal stability performance of JP-6 grade jet fuels and establish causes (in terms of environmental factors and fuel composition) for any adverse results observed. Three potentially useful techniques were produced: (1) a recirculating-flow dynamic method measuring deposit insulating effects around a heated surface which requires 1000 ml fuel samples, (2) a static method measuring deposit insulating effects around a heated nickel wire which requires 150 ml fuel samples, and (=0 a static method based on ch nges in fuel light transmission characteristics after heating which requires only 5-ml fuel samples. The JP-6 storage stability invesigation (1 yr) showed that 3 out of 5 test fuels did deteriorate significantly after 26 wk at 110 F in terms of CFR Fuel Coker rating, while a fourth fuel showed evidence of deterioration in one container only which is attributed to solids contamination. (Author).

Download or read book THERMAL STABILITY OF HYDROCARBON FUELS written by Lucein Bagnetto and published by . This book was released on 1964 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: A program to investigate the effect of storage time and temperature on changes in thermal stability quality as measured by the CRC-Modified (SSF) Coker for five widely different fuel types continues to show no significant deterioration of any fuels after 36 weeks at ambient field conditions or 22 weeks at 130 F. After storage at 180 F for 36 days, four of the fuels showed no loss in thermal stability but an HF alkylate fuel containing abour 2% olefins showed a statistically significant loss of about 100 F after storage periods of 6, 18 and 36 days. Removal of dissolved oxygen (to

Download or read book Thermal Stability and Heat Transfer Investigation of Five Hydrocarbon Fuels written by Benjamin Stiegemeier and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Stability of Hydrocarbon Fuels written by Lucien Bagnetto and published by . This book was released on 1966 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reliability of a small-scale (5-ml Bomb), static thermal stability test procedure, based on optical measurements of fuel compositional changes induced by thermal stressing was established. Five aviation turbine fuels, covering a range in inherent thermal stabilities from 300F to 700F, were studied to determine the effect of storage duration in sealed drums at 40F ambient, 130F and 180F on their thermal stability quality. Four of the fuels, representing straight-run production fuels were not susceptible to deterioration at these storage temperatures through the storage periods investigated. A fifth fuel, synthetic HF alkylate, showed a maximum loss of about 100F at all storage temperatures except 40F. Susceptibility is attributed to its relatively high olefinic content (about 2 volume per cent) and the presence of possible reactive tertiary hydrogen components. Removal of dissolved oxygen to less than one part per million prior to storage prevented deterioration of the HF alkylate fuel and improved the thermal stability of the poorer quality fuels. Information was also obtained on the effects of various contaminants that might be picked up during handling and storage on thermal stability of one fuel.

Download or read book Thermal Stability of Hydrocarbon Fuels written by George D. Kittredge and published by . This book was released on 1965 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research and Development on Thermal Stability of Special Hydrocarbon Fuels written by R. WOLFSHAGEN and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Stability of Distillate Hydrocarbon Fuels written by Kishenkumar Tadisina Reddy and published by . This book was released on 1987 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Survey of Research on Thermal Stability of Petroleum Jet Fuels written by Frank G. Schwartz and published by . This book was released on 1962 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Stability of Energetic Hydrocarbon Fuels in Fuel Systems for Combined Cycle Engines written by K. M. Wohlwend and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On the Thermal Stability of Hydrocarbon Fuels written by M. B. Volf and published by . This book was released on 1967 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thermal stability of fuels for air-breathing jet engines was investigated in a glass placed in a bomb for determining the induction period of gasolines. The tests were made in the presence of a copper plate at 100, 150, 200, and 250C in an atmosphere rarefied with atmospheric nitrogen. In specimens of petroleum types poor in sulfur, maximum precipitation was observed at 200C and in fuels from high-sulfur petroleum types, at 150C. A reduction in the content of aromatic hydrocarbons (especially bicyclic ones) increases the thermal stability of fuels. When the content of paraffins is decreased and that of naphthenes increased, precipitation increases. An increase of the oxygen concentration in the oxidation atmosphere intensifies precipitation. At 150-200C, certain antioxidants reduce the formation of precipitates in fuels.

Download or read book Future Air Force Requirements for Hydrocarbon Fuels written by Jack R. Fultz and published by . This book was released on 1962 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two hydrocarbon structures exhibiting the most promise as candidate high temperature fuels are the alkyl-substituted monocyclics and the alkyl substituted condensed bicyclics. For specialized fuels, the isoparaffin structure best suits the requirements for a weight-limited fuel application whereas for an extreme high density fuel the condensed tricyclic structure exhibits the best compromise of properties. The preliminary results of a vapor fuels study indicate that the basic condensed bicyclic structure once again offers the most promise for an advanced vapor fuel. Research has indicated that a vapor fuel will extend the flight speed of advanced systems beyond mach 5. For greater speeds or for desirable additional cooling below Mach 5, a type of endothermic fuel will be required. The primary contribution of the endothermic fuels program is that the feasibility of conducting this type of reaction under conditions to be encountered in advanced air-breathing systems is established and that the reaction products will perform satisfactorily in the combustor.

Download or read book Effect of Hydrocarbon Fuel Type on Fuel Thermal Stability written by Edgar L. Wong and published by . This book was released on 1982 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Hydrocarbon Fuel Type on Fuel written by and published by . This book was released on 1982 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Deoxygenation and Prestressing on Hydrocarbon Fuel Thermal Stability written by and published by . This book was released on 1983 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Heat Transfer and Thermal Stability of Supercritical JP 7 Fuel written by Diane L. Linne and published by . This book was released on 1997 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stability of High temperature Hydrocarbon Jet Fuels During Storage written by Herbert R. Lander (Jr.) and published by . This book was released on 1964 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Air Force has encountered problems of storing fuel for high-speed, air-breathing aircraft. The thermal stability of high-temperature, hydrocarbon jet fuels is affected by periods of storage. During storage, jet fuels must retain their physical and chemical characteristics. Eighteen JP-6 fuels and nine Thermally Stable fuels were stored for various periods of time; data are presented on the results. After only 30 weeks of ambient storage, eight JP-6 fuels failed to pass the minimum specification requirements (Specification MIL-J-25656B) for thermal stability. All of the fuels monitored passed the thermal stability requirement when procured by the Air Force. The critical period in the life of high-temperature fuels regarding thermal stability occurs in the early storage period. Handling, transfer, and fuel deterioration are cited as possible influences on this early storage degradation. (Author).

Download or read book Heat Transfer and Deposition Behavior of Hydrocarbon Rocket Fuels written by and published by . This book was released on 2002 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the desire to increase the performance of hydrocarbon/liquid oxygen rocket engines naturally leads to increased combustion chamber pressures and higher energy hydrocarbon fuels, the combustion chamber and nozzle heat fluxes also increase. For engines regeneratively cooled with hydrocarbon fuel, this additional thermal stress must be effectively carried by the fuel without degradation of the cooling channel surfaces. A methodology for evaluation of the thermal performance (thermal stability and heat transfer characteristics) of hydrocarbon rocket fuels is suggested. As part of that methodology, an experimental research program to investigate the thermal performance of several new candidate hydrocarbon rocket fuels has been started. The experimental program uses a series of test rigs of increasing complexity and fidelity to successively screen identified fuels without the cost and complexity of a full engine system level test. Results of small-scale thermal decomposition experiments utilizing a System for Thermal Decomposition Studies (STDS) test rig provide an initial evaluation of the thermal stability performance of fuels from very small fuel samples. Measurements of heat transfer coefficient and the effect of wall temperature, flow velocity, and wetted-material on deposit formation in heated test channels are obtained from larger rigs, such as the NASA/GRC Heated Tube Facility and the AFRL/PRS High Heat Flux Facility. Representative results from early testing will be presented to illustrate the effectiveness of the overall approach.