Check patentability & draft patents in minutes with Patsnap Eureka AI!

A method for testing the burning rate of gel propellants

A technology of gel propellant and testing method, which is applied in the direction of chemical analysis by means of combustion, etc., which can solve the problems of long test period, large number of samples required for testing, cumbersome operation steps, etc., and achieve the effect of simple preparation and easy promotion

Inactive Publication Date: 2016-06-01
XIAN MODERN CHEM RES INST
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an efficient and fast test method for the burning rate of gel propellant, which can solve the problems of long test period, cumbersome operation steps and the need for a large number of samples in the traditional test method for the burning rate of gel propellant. question

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
  • A method for testing the burning rate of gel propellants
  • A method for testing the burning rate of gel propellants
  • A method for testing the burning rate of gel propellants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] For a formula of nano-aluminum powder gel propellant at room temperature, the measured burning rate value at 7MPa is as follows:

[0063]

[0064] After Grubbs method, 4 effective data are obtained, the average burning speed is 12.559mm / s calculated by formula (2), and the standard deviation S is calculated by formula (3) u =0.0864, ​​the relative standard deviation (coefficient of variation) C calculated by formula (4) v =0.69%, the burning velocity under this pressure can be expressed as 12.559±0.137mm / s from formula (5).

Embodiment 2

[0066] For a gel propellant prepared by manual mixing, test the burning speed at room temperature with initial pressures of 4MPa, 7MPa, 10MPa, and 13MPa, and calculate the average burning speed by formula (2). The specific values ​​are shown in the table below:

[0067]

[0068] Substituting the values ​​in the table into formula (7), the calculated burning rate pressure index is 0.560, and substituting into formula (8) to calculate the constant term as 3.621. According to formula (6), the burning rate-pressure relationship of the formula gel propellant in the range of 4-13MPa can be expressed as U=3.621P 0.560 .

Embodiment 3

[0070] For a certain high-energy gel propellant, the initial pressure is constant at 7MPa, and the initial temperature of the test sample is -40°C, 20°C and 50°C respectively. The average burning velocity is calculated by formula (2), and the specific values ​​are shown in the following table Shown:

[0071]

[0072] Substituting the values ​​in the table into formula (10), the calculated temperature sensitivity coefficient of burning rate of the gel propellant is 9.551×10 when the pressure is 7MPa -4 / °C. Reference temperature T 0 Taking 20°C as 20°C, and substituting it into formula (8), the corresponding constant term is 1.289. According to formula (9), the formula gel propellant is at 7MPa, the reference temperature T 0 The burning rate-initial temperature relationship at 20°C can be expressed as u=1.289e 0.000955(T-20) .

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a combustion performance testing method for a gel propellant. The method comprises the following steps: directly taking a prepared gel propellant as a sample to be tested and injecting the sample into a thin-wall straight plastic pipe of which the inner diameter is 8mm-10mm and one end is closed to prepare a powder pipe to be detected; fixing the powder pipe to be detected on a powder rack of a combustion room; placing ignition powder on one unclosed end and fixing by using a nickel-chrome wire; coating an end face by using a coating agent; and putting the powder rack of the combustion room, which carries the fixed powder pipe to be detected, into an underwater acoustic emission combustion speed meter to test a combustion speed and finally calculating an average combustion speed, a combustion speed pressure index and a combustion speed temperature sensitivity coefficient. The method is simple and easy to operate and short in testing period, and can rapidly and accurately test the combustion performance of the gel propellant.

Description

technical field [0001] The invention relates to a method for testing the burning rate of a gel propellant. Background technique [0002] The burning rate of the propellant refers to the distance that the solid phase disappears along the normal direction of the surface of the solid propellant per unit time, referred to as the burning rate of the solid propellant. It determines the energy release rate of solid propellants, and is also the core parameter for calculating other combustion properties of solid propellants (burning rate pressure index, burning rate temperature sensitivity coefficient, erosion ratio, etc.). Regardless of the changes in the pressure, initial temperature, air velocity and other influencing factors during combustion, they will eventually be reflected in the changes in the burning rate. In addition, it also directly affects the ballistic performance, flight speed and working stability of the rocket engine. Therefore, the burning rate of solid propellan...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/12
Inventor 裴庆赵凤起徐司雨仪建华姚二岗郝海霞高红旭安亭肖立柏
Owner XIAN MODERN CHEM RES INST
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com