Phase change type paraffin-containing fuel ramjet engine

A ramjet, paraffin fuel technology, applied in ramjet engines, engine components, machines/engines, etc., can solve the problems of short residence time of high-speed incoming air, low combustion efficiency, and long engine size.

Active Publication Date: 2021-05-18
NORTHWESTERN POLYTECHNICAL UNIV
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The paraffin fuel ramjet disclosed in the literature has the following deficiencies: the solid fuel that adopts pure paraffin as the main component has the defect of poor mechanical properties, and may cause fracture problems when the ramjet works; the heterogeneous combustion reaction between the paraffin fuel and air is affected. Diffusion reactions are limited, and the reside

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Phase change type paraffin-containing fuel ramjet engine
  • Phase change type paraffin-containing fuel ramjet engine
  • Phase change type paraffin-containing fuel ramjet engine

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0047] Take 80% of paraffin wax, 10% of polyazide glycidyl ether, 5% of aluminum powder, 3% of toluene diisocyanate, and 2% of magnesium powder as raw materials by mass percentage to prepare tubular paraffin-containing fuel powder column, which is loaded in the form of free filling Gasification chamber: 70% of ammonium perchlorate, 10% of hydroxyl-terminated polybutadiene, 15% of aluminum powder, 3% of toluene diisocyanate, and 2% of magnesium powder are taken as raw materials by mass percentage to prepare tubular solid propellant grains , into the combustion chamber in the form of free filling.

[0048] After the engine and a certain type of product body are assembled, the igniter is energized, and the gas generated by deflagration ignites the solid propellant, and the solid propellant burns in the combustion chamber. After the gas is expanded and accelerated by the nozzle, the heat energy is converted into kinetic energy. Accelerate the missile. After accelerating to a cert...

example 2

[0050] According to mass percentage, 75% of paraffin wax, 15% of 3,3-diazidomethyloxybutane, 5% of aluminum powder, 3% of isophorone diisocyanate and 2% of magnesium powder are used as raw materials to prepare paraffin-containing fuel. Tube-shaped drug type is used, and it is loaded into the gasification chamber in the form of free filling; according to the mass percentage, 65% of ammonium perchlorate, 10% of hydroxyl-terminated polybutadiene, 20% of aluminum powder, 3% of isophorone diisocyanate, 2% magnesium powder is used as raw material to prepare solid propellant. It adopts cone-column powder type and is loaded into the combustion chamber in the form of free filling.

[0051] After the engine and a certain type of product body are assembled, the igniter is energized, and the gas generated by deflagration ignites the solid propellant, and the solid propellant burns in the combustion chamber. After the gas is expanded and accelerated by the nozzle, the heat energy is conver...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a phase change type paraffin-containing fuel ramjet engine, which adopts an integrated design of a combustion chamber and a gasification chamber, and is compact in structure and high in energy utilization rate. A shell is heated by a large amount of heat released by combustion reaction in the combustion chamber, the surface of paraffin-containing fuel can be preheated under the action of radiation and heat convection, and meanwhile, ram air is heated, so that the surface of the fuel has higher temperature, and phase change of the fuel is facilitated. Mode conversion is easy to achieve, and automatic switching between a boosting section and a ramming section can be completed through change of pressure intensity. The head of the combustion chamber is provided with a conical hole with a certain inclination, so that the rotational flow of gas can be realized, and higher combustion efficiency can be further obtained. When the boosting section and the ramming section are switched, a mixture of a phase change product and air generates rotational flow under the action of the conical hole when flowing into the combustion chamber, so that the mixing effect is good. The engine is adjustable in size, wide in application range, and suitable for power systems of supersonic aircrafts.

Description

technical field [0001] The invention relates to the design and manufacture technology of a ramjet, in particular to a phase-change type paraffin-fuel-containing ramjet with good fuel mechanical properties and high combustion efficiency; it is suitable for a power system of a supersonic aircraft. Background technique [0002] The rocket ramjet is an air-breathing engine that uses oxygen in the air to burn with its own fuel. According to the different fuel forms, it can be divided into three types: solid rocket ramjet, liquid fuel ramjet and solid fuel ramjet. Among them, the solid rocket ramjet has the characteristics of easy combustion organization and simple structure, but because the fuel-rich propellant it uses contains part of the oxidizer, the specific impulse is relatively low, while the liquid fuel ramjet and solid fuel ramjet only carry fuel, so energy levels are higher. For liquid fuel ramjet engines, kerosene is generally used as fuel, which has the advantages of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F02K7/10F02C3/26F02C3/28F02C7/04F02C7/224F02C7/08F02K1/80F23R3/58C06B33/06
CPCF02K7/105F02C3/26F02C3/28F02C7/04F02C7/224F02C7/08F02K1/80F02K1/805F23R3/58C06B33/06
Inventor 刘林林季祯胡松启魏祥庚
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap