An investigation of the combustion behavior of solid fuel ramjets by Clemens J. Mady

Cover of: An investigation of the combustion behavior of solid fuel ramjets | Clemens J. Mady

Published by Naval Postgraduate School in Monterey, Calif .

Written in English

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Subjects:

  • Solid propellants,
  • Combustion,
  • Airplanes,
  • Ramjet engines

About the Edition

An experimental and analytical investigation was conducted of the combustion behavior in solid fuel ramjets. The effects of configuration variables on combustion performance were experimentally determined. Air ducting methods were found to affect combustion efficiency through port flow rates, bypass dump momentum and geometry and bypass ratio. Bypass configurations with plexiglas fuel altered the heat transfer mechanisms within the port and decreased combustion efficiency. The analytical model was found to be in qualitative agreement with experimental data. Finite rate kinetics and radiative transfer to the fuel surface will be required in the model to obtain more quantitative accuracy. (Author)

Edition Notes

Book details

StatementC. J. Mady, P. J. Hickey, D. W. Netzer
ContributionsHickey, P. J., Netzer, David Willis, Naval Postgraduate School (U.S.)
The Physical Object
Pagination45 p. :
Number of Pages45
ID Numbers
Open LibraryOL25454366M
OCLC/WorldCa421104983

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An experimental and analytical investigation was conducted of the combustion behavior in solid fuel ramjets. The effects of configuration variables on combustion performance were experimentally determined. Air ducting methods were found to affect combustion efficiency through port flow rates, bypass dump momentum and geometry and bypass :   An illustration of an open book.

Books. An illustration of two cells of a film strip. Video An illustration of an audio speaker. An investigation of the combustion behavior of solid fuel ramjets An investigation of the combustion behavior of solid fuel ramjets by Mady, Clemens J;Hickey, P J;Netzer, David Willis.

Publication date. Investigation of the effect of geometry of combustor on combustion characteristics of solid-fuel ramjet with swirl flow Applied Thermal Engineering, Vol.

Experimental investigation on the effect of swirling flow on combustion characteristics and performance of solid fuel ramjetCited by: Calhoun: The NPS Institutional Archive Theses and Dissertations Thesis Collection An experimental investigation of the combustion behavior of solid fuel ramjets.

Opportunities for Combustion Research on the ISS Droplet Combustion Gaseous Diffusion Flames Solid-Fuel Combustion/Material Flammability Premixed Flames Super-critical Processes. An experimental investigation was conducted to study the effects of inlet step height on ignition and flammability limits and recirculation-zone and boundary-layer.

Flow field characteristics of and regression rate distribution for the solid-fuel ramjet (SFRJ) with star solid fuel were investigated by numerical and experimental methods.

The experimental data were obtained by burning polyethylene using a connected-pipe facility. ABSTRACT. An experimental investigation was conducted to explore the effects of equivalence ratio and air mass flux on the combustion efficiency and particle size distributions in a solid fuel ramjet using a fuel grain highly loaded with boron carbide.

An experimental investigation of the combustion behavior of solid fuel ramjets. data indicated that fuel vapor composition within the SFRJ combustor may have a significant effect on the obtainable combustion efficiency and upon the dependence of combustion upon equivalence ratio and air mass flow rate.

Combustor pressure oscillations in. Abstract For the combustion research of boron particles in solid rocket ramjets, a new experimental system has been developed, which can be used to mimic the flow field conditions in solid rocket ramjets with high temperature, pressure, and convection.

CHAPTER 9. COMBUSTION OF NONVOLATILE FUELS A. Carbon char, soot, and metal combustion B. Metal combustion thermodynamics 1. The criterion for vapor-phase combustion 2. Thermodynamics of metal–oxygen systems 3. Thermodynamics of metal–air systems 4.

Combustion synthesis   An in-house multi-physics coupling code has been developed to solve the 3-D Navier-Stokes equations with chemical reaction to predict the unsteady turbulent combustion in solid-fuel ramjet.

Firstly, the governing equations, chemical reaction models and numerical methods are. An experimental investigation of the effect of boron (B) and aluminum (Al) additives to fuel-rich propellant for a solid fuel ramjet application was performed.

In this research, depending on the composition of metal particles, three types of fuel grains with 15 wt % ammonium perchlorate particles were prepared and tested. Rachel Ben-Arosh's 5 research works with 73 citations and 69 reads, including: Theoretical study of a solid fuel scramjet combustor.

An experimental investigation was conducted of the combustion behavior in solid fuel ramjets in order to determine the effects of configuration variables and operating conditions on combustion.

The present investigation gives an understanding of the most important phenomena that control (or emanate from) the combustion of a cylindrical solid fuel with a rearward facing step, and this has application for solid fuel ramjets, the safe burning of toxic waste, and hot gas generators.

COMBUSTION BEHAVIOR OF SOLID FUEL RAMJETS VOL II. EFFECTS OF FUEL PROPESIES AND FUEL-AIR MIXING ON COMBUSTION EFFICIUCT Michael E. Mtochianakis, William V. Goodwin Uri Katz, and David W. Netzer._J August Approved for public release; distribution unlimiated. The present investigation gives an understanding of the most important phenomena that control (or emanate from) the combustion of a cylindrical solid fuel with a rearward facing step, and this has application for solid fuel ramjets, the safe burning of toxic waste, and hot gas generators.

The results can be summarized as follows. The Ramjet and the Supersonic Combustion Ramjet (Scramjet) Engine Cycle. An invention attributed to René Lorin of France in (Hallion, ), the ramjet is a remarkable air-breathing engine in its conceptual simplicity.

The present investigation gives an understanding of the most important phenomena that control (or emanate from) the combustion of a cylindrical solid fuel with a rearward facing step, and this has application for solid fuel ramjets, the safe burning of toxic waste, and hot gas generators.

The results are summarized. At the analysis of the work process in a ramjet, a complex consideration of the ensemble of problems the solution of which determines the engine efficiency appears reasonable.

The main problems are ensuring a high completeness of fuel combustion and minimal hydraulic losses, the reliability of cooling of high-heat areas with the use of the fuel cooling resource, and ensuring the.

past to investigate the combustion of behavior solid fuel ramjets, was adjusted and used for the test campaigns [28]. A side view of the whole combustion chamber set-up is shown in Fig. The oxidizer main flow is entering the combustion chamber from the left, after having passed two flow straighteners.

The mass flow rate is adjusted by a. Whether the aim is pyrolysis, gasification, or combustion, each of these reactions occurs in some parts of the reactor because of gas–solids contacting. In this chapter, we consider, in order, gasification as an endothermic process to generate H 2 and CO mixtures for fuel or synthesis gas, pyrolysis as a process to generate useful tars (or.

against maneuvering targets. The solid fuel ramjet is especially attractive for the propulsion of projectiles, because it is simple, cheap and has a high fuel density. Figure 1 shows a sketch of a solid fuelramjet combustor. It consists of an inlet, a solid fuel combustion chamber, and a.

burning rate control in solid fuel ramjets or in combustion instability researches. Based on current information, such studies have not been performed comprehensively before. There is a published effort on an investigation of oscillatory field over a transpiring surface which has considered the cold flow semi-similar problem [34].

The main purpose for this journal is to promote scientific investigation, technical advancements, and information exchange in the two closely related areas of energetic materials (EM) and chemical propulsion (CP). Numerous energetic materials have been developed recently for various chemical propulsion applications.

Significant advancements in energetic material synthesis, characterization. An experimental investigation was made of the behavior of a small two-dimensional combustion chamber, burning a uniform mixture of air and fuel vapor under conditions of high-frequency oscillation or screech.

Measurenlents were made of the limits of stable screech, the amplitude and frequency of pressure oscillations over a wide range of. Investigation of Solid fuel Combustion Characteristics: The combustion parameters and efficiency of rotary kilns Paperback – Septem by Bhishma Pandit (Author) See all formats and editions Hide other formats and editions.

Price New from Used from Paperback, Septem "Please retry" $ $ Author: Bhishma Pandit. () An oscillatory route to extinction for solid fuel combustion waves due to heat losses. Proceedings of the Royal Society of London.

Series A: Mathematical, Physical and Engineering SciencesABSTRACT. The regression rate of the solid fuel in the spinning solid fuel ramjet is investigated here using numerical simulations. The finite volume solver of.

Boron-Based Fuel-Rich Propellant Properties, Combustion, and Technology Aspects. Boron-Based Fuel-Rich Propellant Properties, Combustion, and.

Selected publications. Natan, B. and Gany, A., “Ignition and Combustion of Boron Particles in the Flowfield of a Solid Fuel Ramjet,” Journal of Propulsion and. burners. The fuel is introduced into the combustion chamber from the side (with or without a grate).

During combustion the fuel is moved or pushed horizontally from the feeding zone to the other side of the pusher plate or the grate. On its way to drying, gasification and solid combustion take place. The remaining ash drops into an ash container. Find many great new & used options and get the best deals for Laser-Based Investigation of Gas and Solid Fuel Combustion under Oxy-Fuel Atmosphere by Sebastian Burkle (, Trade Paperback) at the best online prices at eBay.

Free shipping for many products. The properties of the surface layer of burning metallized solid propellants are analyzed on the basis of available experimental data.

A general physical concept of processes in the surface layer is developed. The structure called a skeleton layer is shown to play a key role in combustion. The factors influencing the properties of the skeleton layer are determined, and the effect of these of.

ABSTRACT. To investigate the flame stability in a solid-fuel ramjet combustor, time-accurate calculations using a compressible flow solver with a modified Godun. The fuel can be a solid, liquid, or gas, although for airplane propulsion the fuel is usually a liquid.

The oxidizer, likewise, could be a solid, liquid, or gas, but is usually a gas (air) for airplanes. For model rockets, a solid fuel and oxidizer is used. During combustion, new chemical substances are created from the fuel and the oxidizer.

פרסומים נבחרים. Natan, B. and Gany, A., “Ignition and Combustion of Boron Particles in the Flowfield of a Solid Fuel Ramjet,” Journal of Propulsion. 12 Fundamental Definitions Calorific value Amount of heat librated by the combustion of unit quantity of fuel.

kcal/ kg, kcal / m3 Gross Calorific Value (G.C.V) or HCV heating value measurement in which the product water vapour is allowed to condense Net Calorific Value (N.C.V) or LCV heating value in which the water remains a vapor and does not yield its heat of vaporization HHV = LHV + (m. Normally the oxidizer is liquid and the fuel is solid.

In a typical design (Fig. ), the oxidizer is sprayed in at the head end of a solid cylindrical fuel grain. It is apparent that once the liquid oxidizer is injected, the combustion process proceeds according to natural law and the geometric constraints designed into the grain and is not.

This paper represents the medialization of alternative fuels co-combustion, in a cement rotary kiln, established on the commercial computational fluid dynamic (CFD) software ANSYS FLUENT.

The focus is placed on the key issues in the flow field, mainly on how they are affected by turbulence models and co-processing conditions.

Real data, from a Moroccan cement plant, are used for model input. FUELS AND COMBUSTION. 1 Definition. Characteristics for good fuel. Calorific value. Gross or high calorific value (gcv) Net or lower calorific value(ncv) Theoretical calculation of calorific value (dulong‟s formula) 3 Solid fuel.

Advantages of solid fuels. Disadvantages of solid fuels. 4 Coal. Proximate analysis.combustion behavior of boron carbide fuel in solid fuel ramjets james a.

nabity, tae-ho lee, benveniste natan, david w. netzer combustion behavior of boron-based solid propellants in a ducted rocket c. vigot, a. cochet, c. guin experimental investigation of the effect of bypass air on boron combustion in a solid fuel ramjet. The fuel and oxidizer can be a solid, liquid, or gas.

For rocket propulsion the fuel and oxidizer are usually stored as either a liquid or a solid. During combustion, new chemical substances are created from the fuel and the oxidizer. These substances are called exhaust. Most of the exhaust comes from chemical combinations of the fuel and oxygen.

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