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1 edition of Interference effects during buring in air for two stationary n-heptane droplets found in the catalog.

Interference effects during buring in air for two stationary n-heptane droplets

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Published by California Institute of Technology .
Written in English

    Subjects:
  • Aeronautics

  • Edition Notes

    Thesis (AE)--California Institute of Technology, 1955.

    ID Numbers
    Open LibraryOL24995493M

    Google Scholar Listing. Experimental and Kinetic Investigation of Pressure and Temperature Effects on Burning Characteristics of n-Heptane/Air/Hydrogen up to Near Lean Burn Limits. Technical Paper. Ignition of Individual Droplets in a Reactive Fuel/Air Mixture behind Reflected Shock Waves. Journal Article. Through bad Fuel (water in the fuel) or through condensation. The air inside the aircraft fuel tanks can cool at night, and this coolling forms water droplets on the inside of the tank. The water can freeze in cold temps anywhere in the system causing a blockage & fuel starvation for the engine. A steam engine is a heat engine that performs mechanical work using steam as its working steam engine uses the force produced by steam pressure to push a piston back and forth inside a cylinder. This pushing force is transformed, by a connecting rod and flywheel, into rotational force for term "steam engine" is generally applied only to reciprocating .   The initial droplet diameter was fixed at mm, and all experiments were performed in atmospheric air. The impact velocity was fixed at m/s thus defining an impact Weber number of The temperature of the stainless steel surface was varied from 20 to C, above the Leidenfrost temperature of HFECited by:

    The diesel engine (also known as a compression-ignition or CI engine), named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to the mechanical compression (adiabatic compression).This contrasts with spark-ignition engines such as a petrol engine (gasoline .


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Interference effects during buring in air for two stationary n-heptane droplets by James Foster Rex Download PDF EPUB FB2

Calhoun: The NPS Institutional Archive Theses and Dissertations Thesis Collection Interference effects during buring in air for two stationary n-heptane droplets. Rex, James Foster () Interference effects during burning in air for two stationary N-heptane droplets.

Interference effects during buring in air for two stationary n-heptane droplets book thesis, California Institute of Technology. doi/Z-RAAuthor: James Foster Rex. In order to gain some understanding of droplet interference during burning, experiments have been conducted for the determination of the evaporation constant and flame shapes of two closely spaced n-heptane droplets burning in air.

Droplets of approximately the same and of different diameters were used at various distances between the droplet mental Author: James Foster Rex. Interference Effects During Burning in Air for Stationary n-Heptane, Ethyl Alcohol, and Methyl Alcohol Droplets1 J.

REX,2 A. FUHS,3 and S. PENNER4 Daniel and Florence Guggenheim Jet Propulsion Center, California Institute of Technology, Pasadena, Calif. Experiments have been conducted for the determination.

Interference effects during buring in air for two stationary n-heptane droplets. By James Foster Rex Get PDF (4 MB)Author: James Foster Rex. Interference effects during burning in air for two stationary N-heptane droplets. By James experiments have been conducted for the determination of the evaporation constant and flame shapes of two closely spaced n-heptane droplets burning in air.

Droplets of approximately the same and of different diameters were used at various distances Author: James Foster Rex. Burning characteristics of an iso-lated droplet will be affected when another neighboring droplet burns along with it.

This is due to two interfe-rence effects; enhancement in heat transfer. J.F. Rex, A.E. Fuhs, S.S. PennerInterference effects during in air for stationary n-heptane, ethyl alcohol, and methyl alcohol droplets Jet Propulsion, 26 (), pp.

Google ScholarCited by: The combustion of n-heptane liquid droplets was studied. The initial diameter, surface tension coefficient, viscosity and latent heat of vaporization of an n-heptane droplet are 1 mm, N m −1, kg m −1 s −1 and × 10 4 kJ/kg −1, respectively.

The ambient gas is a mixture of air and a diluent gas (helium, carbon Cited by: Evaporation of n-heptane Droplet in a Turbulent on untested approximations on the effect of gas phase turbulence on spray gasification [].

This is The vessel has two pairs of opposed optical/quartz windows. The two pairs are positioned 90 degrees apart. The four quartz windows are designed to enable performing Laser.

Interference effects during burning in air for stationary n-heptane, ethyl alcohol, and methyl alcohol droplets. By J. Rex, A. Fuhs and Interference effects during buring in air for two stationary n-heptane droplets book. Penner. Download PDF ( KB) Abstract. Experiments have been conducted for the determination\ud of the evaporation constant and flame shapes of two and\ud of five closely spaced droplets burning Cited by: American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA J.

Rex, A. Fuhs and S. Penner, Interference effects during burning in air for stationary n-heptane, ethyl alcohol and methyl alcohol droplets. Jet Propuls (). Kanevsky, Interference during burning in air Interference effects during buring in air for two stationary n-heptane droplets book nine stationary fuel droplets Interference effects during buring in air for two stationary n-heptane droplets book in a body-centered cubic lattice, Jet Propuls Cited by: The Navier-Stokes and energy equations have been solved numerically for a pair of spheres in tandem at Re = 40 for two different spacings using bispherical coordinates.

the solutions compare favorably with experimental results. the drag coefficient and the average Nusselt number of either sphere is always less than that of a single isolated sphere, the effect being much Cited by: INTERFERENCE effects during burning in air for sta­ tionary body-centered cubic arrays of nine droplets have been determined for n-heptane and methyl alcohol by using a procedure similar to that described for two-and five-droplet arrays in a previous publication (1).3 The burning rate of the droplet located at the center of the cubic lattice was.

Burning of two n-heptane droplets placed side-by-side in a convective flow having significant turbulence fluctuations is studied using suspended droplet.

A qualitatively similar dependence of the ignition delay time can be observed in the case of the homogeneous n-heptane/air gas mixture. In this case the exponent of the power law is determined to approximately − 4.

Conclusions. Autoignition of single n-heptane droplets in air is simulated for a wide range of conditions. The simulations Cited by:   In Fart I of a two-part contribution, recent advances in understanding the combustion process of liquid fuels are reviewed. The main objective of the review is to provide an introduction to the subject and to stimulate concerns on the issues related with the liquid fuel combustion by: 4.

Reduced-gravity experiments were performed on combustion of droplets composed of n-heptane mixed with methanol or ethanol. The initial alcohol mass fraction in a droplet was 0% (pure heptane) or 5%. We report the evaporation and discharge dynamics of three volatile hydrocarbon solvents, and relate the dynamics to previously researched solvents widely employed in electrospray mass spectrometry.

The present work investigates positively charged μm droplets of n-heptane, n-octane, and p-xylene with up to elementary charges. Combustion of unsupported water-in- n-heptane emulsion droplets in a convection-free environment. Predicted and measured burning rates are in good agreement during.

A study of the evaporation and burning characteristics of unsupported fuel droplets was carried out. Several experiments were performed to focus on the following aspects of the droplet burning process: (1) mechanisms of disruptive burning, (2) preferential evaporation of droplets which are emulsified fuels, (3) the absence of buoyancy induced flow around the droplet, and (4) soot.

Manjunath, Vishnu Pandey, P. Senthil Kumar and V. Raghavan, Experimental study of interference effects during the burning of two ethanol droplets suspended in side-by-side arrangement, ICLASS13th Triennial International Conference on Liquid Atomization and Spray Systems, Tainan, Taiwan, AugustExperiments have been conducted for the determination of the evaporation constant and flame shapes of two and of five closely spaced droplets burning in air.

We report the first measurement of the relative stability of two stable stationary states in a bistable system, that of an optically bistable ZnSe interference filter. A thin ZnSe rectangle is illuminated and bounded by nonilluminated regions at room by:   Molecular dynamics simulations using a modified Drieding force field were carried out to study the coalescence behavior of nanometer-sized water droplets in vacuum and in n-heptane.

The coalescence mechanisms of the water droplets in the above-noted environments are fairly similar in a sense that the water droplets form a bridge linking the droplets Cited by: Numerical investigation of stretch effect for n-heptane/air mixture combustion process in constant volume chamber with the use of gradient method combustion model in LES Paper presents the results of numerical simulations with combustion model.

The objective of this work is to examine the effect of dynamic pressure on the behavior of a horizontally burning flame based on experimental approach. The experiments were conducted in a large-scale altitude chamber of size 2 m × 3 m × m under three different dynamic pressures with various depressurization rates.

Two round steel fuel pans of 20 or 30 Cited by: 6. SOME RECENT OBSERVATIONS ON THE BURNING OF ISOLATED N-HEPTANE AND ALCOHOL DROPLETS F.

Dryer, A. Kazakov, and B.D. Urban Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ INTRODUCTION In a joint program involving Prof. F.A. Williams of the University of California, San Diego and. In this chapter we concentrate on fundamental issues of shock-induced particle and drop ignition and Sivasankaran, K., Seetharamu, K.N., Natarajan, R.: Numerical investigation of the interference effects between two burning fuel spheres.

On the suppression of negative temperature coefficient (NTC) in autoignition of n-heptane droplets. Author: Fan Zhang. the effects of strain rate and nitrogen dilution on the structure and emission of n-heptane/air nonpremixed flames.

We selected four of the cases that were investigated to characterize the flame structures for which the operating conditions in terms of strain rate, nitrogen dilution, and nozzle-separation distance are reported in Table by: 6.

Determination of N-heptane Contamination in Air: Experimental Validation Lars DUGGEN, Mihaela ALBU, Morten WILLATZEN, and Horst-Gunter RUBAHN¨ NanoSYD, Mads Clausen Institute, University of Southern Denmark Alsion 2, DK Sønderborg, Denmark ABSTRACT We briefly present the basic principle of the photoacoustic effect in gases.

74_Rex_JF_ - Free download as PDF File .pdf), Text File .txt) or read online for free. Interference Effects During Burning in Air for Stationary n-Heptane, Ethyl Alcohol, and Methyl Alcohol Droplets.

Experimental results for two n-heptane droplets burning in still air]) 2. an experimental study on the pool fire burning characteristics of n-heptane and ethanol in the tunnels a thesis submitted to the graduate school of natural and applied sciences of middle east technical university tevfİk uluÇ yamali in partial fulfillment of the requirements for the degree of master of science in mechanical engineering june File Size: 5MB.

An experimental study is presented on the evaporation of diluted droplet-laden two-phase jet flows within a heated air channel co-flow.

In this study, n-heptane is pre-atomized by an ultrasonic nozzle to produce droplet cluster with a median diameter of about15μm, and a continuous cold air flow is applied to carry the fuel droplet cluster to emerge from a nozzle Author: Huifeng Gong, Zongjie Hu, Yaozu Zhang, Qiong Yang, Liguang Li.

Figure Schematic representation of the Gibbs-Marangoni effect acting on two approaching droplets during emulsification. (a) Droplets insufficiently covered approaching; surfactants dispersed in the water phase are less numerous where the film is thinner.

(b) Droplets are not. Greater or less the amount of solar energy absorbed during its formation, depending on how it is burned Equal to the amount of solar energy absorbed during its formation Atoms gain or lose electrons in order to attain a valence orbital arrangement like that of a noble gas.

Schematic of various collision regimes of hydrocarbon droplets in 1 atm. air. with R being the droplet radius, U the relative velocity, v the projection of the separation distance between the droplet centres in the direction normal to that of U.

A novel multiple drop levitator for the study of drop arrays A novel multiple drop levitator for the study of drop arrays Tian, Yuren; Apfel, Robert E.

A novel acousto-electric levitator has been developed for studying various phenomena associated with drop arrays.

In order to stably levitate a group of drops, charged drops are generated in an acoustic field. We report studies of the evaporation and discharge dynamics of highly charged droplets generated by electrospray ionization from n-heptane, n-octane, and p-xylene doped with Stadis, a conductivity-enhancing agent.

A phase Doppler anemometer (PDA) characterizes individual droplets moving through the uniform electric field within an ion mobility cell Cited by:. Air pdf 3% acetone and 2% water is fed to an absorber column.

The mass flow pdf of air is kg/h. Pure water is used as absorbent to absorb acetone from air. The air leaving the absorber should be free of acetone.

The air leaving the absorber was found to .a piece of equipment that uses steam under download pdf or gas to sterilize eqipment and supplies.

it is the most efficient method of sterilizing most articles, and it will destroy all microorganisms, both pathogenic and nonpathogenic, including spores and viruses.

items that are to remain sterile must be wrapped and properly prepared before they are autoclaved. the length of time and amount .Droplet Vaporization in a Levitating Acoustic Field G.

A. Ruff1,S. Liu2, and I. Ciobanescu2 1NASA Ebook Research Center, Cleveland, OH 2Mechanical Engineering and Mechanics Department, Drexel University, Philadelphia, PA INTRODUCTION Combustion experiments using arrays of droplets seek to provide a link between singleCited by: 1.