Results 41 to 50 of about 37,522 (203)

A theoretical study on throttle ranges of O/F controllable hybrid rocket propulsion systems

Journal of Fluid Science and Technology, 2018
The characteristics of several O/F control methods for hybrid rocket propulsion have been discussed and theoretically analyzed from the physical properties of propellants and fuel regression behavior.
Kohei OZAWA, Toru SHIMADA
doaj   +1 more source

Thermodynamics of the deposition of complex waxes and asphaltenes in crude oil [PDF]

, 2009
Peer reviewedPublisher ...
Ball, Rowena, Jones, John C
core   +1 more source

Experimental Investigation of a H₂O₂ Hybrid Rocket with Different Swirl Injections and Fuels

Applied Sciences
Hybrid rockets have very interesting characteristics like simplicity, reliability, safety, thrust modulation, environmental friendliness and lower costs, which make them very attractive for several applications like sounding rockets, small launch ...
Manuel Stella, Lucia Zeni, Luca Nichelini, Nicolas Bellomo, Daniele Pavarin, Mario Tindaro Migliorino, Marco Fabiani, Daniele Bianchi, Francesco Nasuti, Christian Paravan, Luciano Galfetti, Attilio Cretella, Rocco Carmine Pellegrini, Enrico Cavallini, Francesco Barato   +14 more
doaj   +1 more source

EXPOSURE CHARACTERIZATION AND POTENTIAL HEALTH IMPACTS OF DOMESTIC FUEL USE IN HOMES IN KHAYELITSHA, WESTERN CAPE

Clean Air Journal, 1996
The pattern of fuel use in Lower socio-economic class homes in the Western Cape differs from that in Gauteng province, in that the use of paraffn and gas predominates. The degree of exposure to gaseous and particulate pollutants as a result of the use of
R. Truter, S. Mbuli, R. Bailie, I. Danford, A.P.S. Terblanche, R. Ehrlich   +5 more
doaj   +1 more source

Association between cooking fuels and mild cognitive impairment among older adults from six low- and middle-income countries

Scientific Reports, 2022
There is a small body of evidence suggesting that unclean cooking fuel use may be associated with cognitive decline. However, to date, no study has investigated the association between unclean cooking fuel and mild cognitive impairment (MCI).
Lee Smith, Damiano Pizzol, Guillermo F. López Sánchez, Karel Kostev, Hans Oh, Louis Jacob, Nicola Veronese, Benjamin R. Underwood, Laurie Butler, Yvonne Barnett, Mark A. Tully, Ai Koyanagi   +11 more
doaj   +1 more source

Permitted daily exposure for diisopropyl ether as a residual solvent in pharmaceuticals [PDF]

, 2018
Solvents can be used in the manufacture of medicinal products provided their residual levels in the final product comply with the acceptable limits based on safety data.
Evandri, Maria Grazia, Romanelli, Luca
core   +1 more source

Experimental Study of Polyurethane-Based Fuels with Addition of Paraffin and Aluminum for Hybrid Rocket Motors

Journal of Aerospace Technology and Management, 2013
http://dx.doi.org/10.5028/jatm.v5i3.228 Experimental investigation was conducted to determine the relative propulsive and combustion behavior of several polyurethane-based solid-fuel formulations containing 30% w/w of paraffin or 10% of aluminum powder.
Susane Ribeiro Gomes, Leopoldo Rocco Junior, José Atílio Fritz Fidel Rocco, Koshun Iha   +3 more
doaj  

Features of paraffin-based fuel conversion for hybrid engines

Авіаційно-космічна техніка та технологія
The subject of this study is the evaporation and combustion processes of paraffin droplets in a gaseous medium containing an oxidant (air). Paraffin is a low-melting material that can be used as an environmentally friendly and high-energy fuel for hybrid
Svitlana Orlovska
doaj   +1 more source

Ignition Delay Times of Kerosene (Jet-A)/Air Mixtures

, 2014
Ignition of Jet-A/air mixtures was studied behind reflected shock waves. Heating of shock tube at temperature of 150 C was used to prepare a homogeneous fuel mixture. Ignition delay times were measured from OH emission at 309 nm and from absorption of He-
Andrey Yu. Starikovskiy, Chaos, Dagaut, Dean, Edwards, Gueret, Kumar, Li, Petersen, Petersen, Pfahl, Starikovskiy, Vargaftik, Vasu, Victor P. Zhukov, Vladislav A. Sechenov, Wang, Zhukov, Zhukov, Zhukov, Zhukov, Zhukov, Zhukov   +22 more
core   +1 more source

Towards High-performing Paraffin-based Fuels Exploiting the Armored Grain Concept

, 2022
In the recent years, hybrid rocket engines (HREs) for aerospace applications have received growing attention as testified by the study of these systems for different propulsive missions. NASA has considered a paraffin-based HRE for the Mars Ascent Vehicle (MAV); Virgin Galactic has conceived SpaceShipTwo, a N2O/Polyamide hybrid motor for space tourism;
Bisin, R., Paravan, C., Verga, A., Galfetti, L.   +3 more
openaire   +2 more sources