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Monday, April 27, 2020 | History

3 edition of Effects of fuel distribution on detonation tube performance found in the catalog.

Effects of fuel distribution on detonation tube performance

Effects of fuel distribution on detonation tube performance

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  • 8 Currently reading

Published by National Aeronautics and Space Administration, Glenn Research Center, Available from NASA Center for Aerospace Information in [Cleveland, Ohio], Hanover, MD .
Written in English

  • Navier-Stokes equation.,
  • Pulse detonation engines.,
  • Fuel combustion.,
  • Fuel-air ratio.,
  • Detonation.,
  • Detonable gas mixtures.

  • Edition Notes

    StatementHugh Douglas Perkins.
    Series[NASA technical memorandum] -- NASA/TM-2002-211712., NASA technical memorandum -- 211712.
    ContributionsNASA Glenn Research Center.
    The Physical Object
    Pagination1 v.
    ID Numbers
    Open LibraryOL16094367M

      Detonation caused by lean mixture I've been studying for my aircraft tech ground exam and reading about the hazards of over-leaning the mixture. It brings to mind a time when I did a solo flight and managed to taxi to the holding point and do power checks with lean mixture, right up to the point where the checklist told me to check 'Mixture Rich'. @article{osti_, title = {Development of a novel miniature detonation-driven shock tube assembly that uses in situ generated oxyhydrogen mixture}, author = {Janardhanraj, S. and Jagadeesh, G., E-mail: [email protected]}, abstractNote = {A novel concept to generate miniature shockwaves in a safe, repeatable, and controllable manner in laboratory . Attention is given to turbulent flame propagation and acceleration in the presence of obstacles, the detonation of unconfined fuel aerosols, the initiation of unconfined gas detonations in hydrocarbon-air mixtures by a sympathetic mechanism, a detection method for the deflagration to detonation transition in gaseous explosive mixtures, the.   Running 87 would not damage the engine or affect performance. Higher octane gas is used to prevent detonation (knock or pinging in the engine), most vehicles however are capable of accepting lower octane fuel. If you were to hear a pinging or knocking in the engine switch back to 89, but only 2 octane points is nothing for your Honda engine.

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Effects of fuel distribution on detonation tube performance Download PDF EPUB FB2

Effects of Fuel Distribution on Detonation Tube Performance Hugh Douglas Perkins National Aeronautics and Space Administration Glenn Research Center Cleveland, Ohio Summary A pulse detonation engine (PDE) uses Effects of fuel distribution on detonation tube performance book series of high frequency intermittent detonation tubes to generate Effects of fuel distribution on detonation tube performance book Get this from a library.

Effects of fuel distribution on detonation tube performance. [Hugh Douglas Perkins; NASA Glenn Research Center.]. Fuel Distribution Effects on Pulse Detonation Engine Operation and Performance Article in Journal of Propulsion and Power 22(6) November with 19.

A pulse detonation engine with the inner diameter of 50 mm and total length of mm was designed. Gasoline was used as the fuel and air as the oxidizer. The detonation tube was closed at one end and open at the other, which is comprised of a thrust wall, an ignition section, a detonation initiation section, a detonation chamber, a catalytic section, and a heat exchanger, as illustrated in Fig.

1 (catalytic section was not installed) and Fig. inlet ports of oxygen, purge gas and fuel were located at the thrust by: 4. Computational studies of pulse detonation engines (PDEs) include assessing the impact of chemical recombination and detonation initiation conditions on the computed performance and estimating the theoretical performance of an ideal PDE.

A wide range of cases involving partial fuel-fill effects have been investigated to quantify the effects, elucidate the underlying.

detonation tube3. The computation, which included fi nite rate chemistry effects, showed that some recombination occurred in the burning gases behind the detonation wave. The recombination served to decrease the amount of sensible heat loss that occurs during the detonation process.

Performance CalculationsCited by: 4. Switching to a higher octane fuel in order to reduce the heat of the firing chamber and burn fuel more slowly is the best way to combat false firing.

Similarly, reducing engine inlet air temperatures will greatly reduce the chance Effects of fuel distribution on detonation tube performance book pre-ignition and detonation. As a principle, for every 10 degrees cooler the inlet air is, it produces one percent more power.

Rotating detonation engines are a novel device for generating thrust from combustion, in a highly efficient, yet mechanically simple form. This chapter presents a detailed literature review of rotating detonation engines.

Particular focus is placed on the theoretical aspects and the fundamental operating principles of these engines. The review covers both experimental and Author: Ian J. Shaw, Jordan A.C. Kildare, Michael J. Evans, Alfonso Chinnici, Ciaran A.M.

Sparks, Shekh N.H. Atomic Performance Products - Engine Failure Caused By Detonation run bad or the wrong type of fuel or suffer from fuel related issues that can cause detonation in the combustion chamber. Pulse detonation engines (PDEs) are new exciting propulsion technologies for future propulsion applications.

The operating cycles of PDE consist of fuel-air mixture, combustion, blowdown, and purging. The combustion process in pulse detonation engine is the most important phenomenon as it produces reliable and repeatable detonation waves.

The detonation wave initiation in Cited by: Effects of fuel distribution on detonation tube performance book. Perkins and C. Sung, “Effects of Fuel Distribution on Detonation Tube Performance,” Journal of Propulsion and Power 21 (3), (). Huang, C. Sung, and J. Eng, “Effects of Secondary Air on Global Hydrocarbon Consumption Rates in Engine Exhaust Gas,” Combustion Science and Technology().Author: Orlando Echevarria.

engine, comparing the performance of the Swift fuel to LL fuel, and a detonation performance test was run in a Lycoming TIOJ2BD engine. A full laboratory analysis Effects of fuel distribution on detonation tube performance book performed on the Swift fuel to compare its results to the current leadedFile Size: 8MB.

Fluid viscosity is a significant factor resulting in the energy loss in most fluid dynamical systems. To analyze the energy loss in the pulse detonation engine (PDE) due to the viscosity of the fuel, the energy loss in the Burgers model excited by periodic impulses is investigated based on the generalized multisymplectic method in this by: 1.

Whenever detonation occurs, you have several options (assuming you're sticking with the fuel in question): Option 1 is to enrich the fuel mixture and test to verify that detonation is avoided with no loss in power. Option 2 is to command less spark advance timing in the main ignition map. Option 3 is to tolerate the detonation if it's slight.

3 at the end of the tube,the detonation is propagating and for short period of time afterwards. When the detonation wave reaches the open end of the tube the detonation process ceases since there is no fuel outside the tube.

The detonation products flow out of the tube creating a shockwave in the external region and a series ofCited by: 1. that ANFO's detonation velocity varies considerably with charge diameter.

Yancik(1), Petes(2), and others have shown that several other physical properties can affect ANFO's detonation velocity. These in-clude the type of confinement, explosive density, particle size and distribution, fuel oil content, mois-ture content and temperature.

Detonation. Under normal conditions, the combusting air and fuel mixture inside the combustion chamber ignites in a controlled manner. The mixture is ignited by the spark, normally in the centre of the cylinder, and a flame front moves from the spark towards the outside of the cylinder in a controlled burn.

Abstract. A detonation tube was built to study the deflagration-to-detonation transition (DDT) process and the impulse generated when combustion products exhaust into the atmosphe. Ethanol and Engine Performance Sincethe amount of ethanol blended into gasoline has steadily increased from % to 10% in In the same amount of time, there have been numerous uninformed and unsubstantiated allegations regarding.

Pictures show the effects oil ingestion at high rpm, which is common on stock engines with standard pcv plumbing. Oil ingestion lowers the octane rating of your fuel with the onset of detonation. Incorrect fuel, contaminated fuel, defective fuel delivery are also common culprits. Well, for starters perfect AFR isthat is theoretical or stoich as we call it, Air fuel ratio.

In all Fi automobiles or even later carbed versions this ratio keeps on changing as per requirement and load depending on lots of factors and en. Abstract. Pulse detonation engine technology has recently emerged as a future aerospace propulsion technology.

In this paper we studied various parameters affecting the performance of Pulse detonation engine (PDE) like pulse detonation engine Tube diameter (combustion tube), Pulse tube length for proper deflagration to detonation transition (DDT),Cell size, Equivalence Cited by: 1.

Effects of air intake pressure on the engine performance, fuel economy and exhaust emissions of a small gasoline engine filter, which lowers the pollutant in the air intake to an acceptable level but on the other. detonation study using natural gas as the fuel.

The detonation tube used was measured to be mm in length with mm of internal diameter. The target of this research is to study the effect variable percentage of oxygen used as oxidizer and nitrogen as the diluents gas to the pulse detonation combustion of natural gas.

The effects of. PRE-IGNITION AND DETONATION BEFORE we consider the use of other additives to the fuel we must get a clear understanding of the problem introduced by two well known conditions that occur, especially when you are seeking high performance from the engine, and in particular using fuel of the type we have been discussing.

Detonation (not to be confused with pre-ignition) is a spontaneous combustion of the end-gas (remaning air-fuel mixture) within the combustion chamber AFTER the spark/ignition. Combustion of the air-fuel mixture is supposed to be a smooth, control.

A pulse detonation engine (PDE) is a type of propulsion system that uses detonation waves to combust the fuel and oxidizer mixture. The engine is pulsed because the mixture must be renewed in the combustion chamber between each detonation wave and the next.

Theoretically, a PDE can operate from subsonic up to a hypersonic flight speed of roughly Mach 5. An ideal. If you want to add one of the slick Holley, ACCEL, or Edelbrock fuel-injection systems to your small-block V-8, or if you want to get rid of the black cloud behind your Eclipse after your injector and 20G swap, you need this book.

With information in this book, you'll never have to wonder if your tune is just right - you'll know it/5(30). through a tube, creating a thrust. Shock Waves inside engine travels at either at subsonic or supersonic speed depending upon the physical parameters of tube, frequency of detonation and rate of injection of air-fuel mixture in the tube.

Detonation combustion causes rapid burning of fuel-File Size: KB. The effect of a porous thrust surface on detonation tube impulse. 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, July, Huntsville, Al, AIAA72 M. Cooper and J. Shepherd. The effect of nozzles. 3 Detonation Tube Results Before starting RDE computations, we spent some time with computing detonation waves in tubes to get an idea for how well our numerical models worked on a more standard configuration.

The length of the detonation tube is generally mm and is filled with a specified premixture at K, 1 atm. Walls areFile Size: KB. Effects of LPG on engine performance and exhaust emissions Researchers have tested various numbers of methods to improve the performance of SI engine fueled with LPG.

A brief review of the effect of various parameters like compression ratio, ignition timing, variable stroke length etc. is presented here. In this paper through own worked out programmed code in MATLAB will presenting effect of intercooler (as a heat exchange device air-to-liquid with three different size and over – all heat transfer coefficient and one base) at e multi-cylinder engine performance for operation at a constant speed of Size: KB.

properties for a stoichiometric mixture, is applied to a simple detonation tube test case configuration. The computed pressure rise and detonation velocity are shown to be in good agreement with published literature.

Additional computations examine the effects of initial pressure, temperature, and mass flux on the physical properties of the. Simulation to evaluate the effect of fuel composition on cycle-to-cycle variability.

As it will be demonstrated, fuel formulation strongly influences both air/fuel ratio and local charge temperature distributions, which in turn are fundamental parameters in the evaluation of the combustion process development and the engine knock tendency [2].

with diesel fuel 10 The effects of palm oil biodiesel on engine performance and emissions 12 The changes of fuel inlet temperature and its effects 14 Performance of preheated biodiesel 15 Emissions of preheated biodiesel 22 Summary 30 CHAPTER 3 METHODOLOGY 32 Test fuels 32 Blending process The Project X1/9 book, written by PBS for Fiat, details these modifications for production class racing.

One design problem which these carburetors have is that the super-jet, high-speed-enrichment-circuit, pickup port is located high enough in the float bowl that the fuel level drops below it during hard left-hand corners.

Takeuchi, S, Doi, N, Kasahara, J, Murayama, M & Matsuo, ANet impulse measurements of pulse detonation tube by using fuel-air mixture. in 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition.,48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Cited by: 2.

Exposing the Myths of High Octane Fuel and the Definition of Detonation. The best predictor of a fuel's performance in a street/strip machine is the Anti-Knock index (AKI). This is simply the average of the RON and MON numbers, or (RON + MON) / 2. Most all octane ratings posted at the pumps are determined by this AKI formula, and are the.

The effect of increasing of diesel fuel temperature upon. M. Salih, and the magnetized fuel pdf the pdf of compression ignition engine. The engine performance Fuel Consumption The glass tube was used to measure the fuel consumption of the (C.I.

engine). This glass tube has a constant volume () ml, and a.Today fuel additives had been used widely for the enhancement of fuel economy and engine performance. Download pdf additives are substance that acts as catalysts for the completeness combustion of fuel in order to increase the heat released and hence the work output will be improved.

The purpose of this paper is to investigate the effect of the additives on fuel heating value and Author: Zulkarnain Abdul Latiff, Azhar Abdul Aziz, Mohd Rozi Mohd Perang, N.

Abdullah.C9 is a octane (R+M/2) non-oxygenated fuel that provides a more economical alternative to Ebook, with performance gains and detonation protection superior to pump gas. Because it’s ethanol-free, it also protects your engine during long-term storage.

C85 is for users of E