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Implementation method of kerosene-based fuel for scramjet engine started by low Mach number

A technology of scram stamping and realization method, which is applied in the direction of fuel, liquid carbon-containing fuel, petroleum industry, etc., can solve the problems of poor ignition performance, quality penalty, and deterioration of fuel combustion characteristics, and achieve stable physical form, simple operation, The effect of efficient regulation

Active Publication Date: 2021-06-25
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reliable ignition and efficient combustion of hydrocarbon fuels in scramjet combustors at low flight Mach numbers (<Ma4.0) remains a challenge
The existing technologies use forced ignition and flame stabilization mechanisms as auxiliary devices, but none of these auxiliary devices can achieve low Mach number starting of the ramjet engine or the starting effect is not very satisfactory, which not only increases the complexity of the engine system but also brings corresponding problems. quality penalty
In addition, under the harsh working conditions of low temperature, low pressure and high flow, the liquid hydrocarbon fuel of scramjet engine will lead to a sharp deterioration of fuel combustion characteristics and poor ignition performance

Method used

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  • Implementation method of kerosene-based fuel for scramjet engine started by low Mach number
  • Implementation method of kerosene-based fuel for scramjet engine started by low Mach number

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0015] In this embodiment, the liquid hydrocarbon fuel is configured according to the following proportions:

[0016] Step 1, utilizing to add RP-3 kerosene in the fuel tank that feeds nitrogen, the volume fraction (that is, the volume ratio accounting for the final product kerosene-based fuel, the same below) is 69%;

[0017] Step 2, adding 1-octene to the fuel tank with RP-3 kerosene added, the volume fraction is 10%.

[0018] Step 3: add activator borane triethylamine and 1-octene into the fuel tank to react, the volume fraction is 10%.

[0019] Step 4: Add di-tert-butyl peroxide, a free radical enhanced ignition agent, into the fuel tank, with a volume fraction of 10%.

[0020] Step 5. Add benzoquinone, a free radical stabilizer, into the above-mentioned fuel tank, with a volume fraction of 1%.

[0021] Step 6. The liquid in the fuel tank is uniformly mixed by means of magnetic stirring.

[0022] In this example, modified RP-3 kerosene was prepared by using a modified h...

Embodiment 2

[0024] In this embodiment, the modified liquid hydrocarbon fuel is configured according to the following proportions:

[0025] Step 1, utilize to add RP-3 kerosene in the fuel tank that feeds nitrogen, volume fraction is 63%;

[0026] Step 2, adding 1-octene to the fuel tank with RP-3 kerosene added, the volume fraction is 12%.

[0027] Step 3, add activator borane triethylamine and 1-octene into the above-mentioned fuel tank to react, the volume fraction is 12%.

[0028] Step 4, adding di-tert-butyl peroxide, a free radical enhanced ignition agent, into the above fuel tank, with a volume fraction of 12%.

[0029] Step 5. Add benzoquinone, a free radical stabilizer, into the above-mentioned fuel tank, with a volume fraction of 1%.

[0030] Step 6. The liquid in the fuel tank is uniformly mixed by means of magnetic stirring.

[0031] In this example, modified RP-3 kerosene was prepared by using a modified hydrocarbon fuel preparation device. The ignition characteristics of ...

Embodiment 3

[0033] In this embodiment, the modified liquid hydrocarbon fuel is configured according to the following proportions:

[0034] Step 1, utilize to add RP-3 kerosene in the fuel tank that feeds nitrogen, volume fraction is 54%;

[0035] Step 2, adding 1-octene to the fuel tank with RP-3 kerosene added, the volume fraction is 15%.

[0036] Step 3: adding activator borane triethylamine and 1-octene into the above-mentioned fuel tank to react, the volume fraction is 15%.

[0037] Step 4, adding di-tert-butyl peroxide, a free radical enhanced ignition agent, into the above-mentioned fuel tank, with a volume fraction of 15%.

[0038] Step 5. Add benzoquinone, a free radical stabilizer, into the above-mentioned fuel tank, with a volume fraction of 1%.

[0039] Step 6. The liquid in the fuel tank is uniformly mixed by means of magnetic stirring.

[0040] In this example, modified RP-3 kerosene was prepared by using a modified hydrocarbon fuel preparation device. The ignition charac...

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Abstract

An implementation method of kerosene-based fuel for a scramjet engine started at a low Mach number comprises the following steps of: adding a borane triethylamine complex into a mixed fuel of 1-octene and RP-3 kerosene, and carrying out hydroboration reaction to obtain initial modified kerosene; and mixing the initial modified kerosene with di-tert-butyl peroxide serving as a free radical ignition enhancer and benzoquinone serving as a free radical stabilizer to obtain kerosene-based fuel. Starting of the scramjet engine when the incoming flow Mach number is 1.5 can be achieved through electric spark ignition, and good stability is achieved during contact with air in a normal-temperature environment. Starting and stable combustion of the scramjet engine under the low Mach number are achieved by synthesizing the kerosene-based fuel, the operation is easy, and the practicability is high.

Description

technical field [0001] The invention relates to a technique in the field of scramjet fuel, in particular to a method for realizing kerosene-based fuel for a scramjet starting at a low Mach number. Background technique [0002] The minimum starting Mach number of a scramjet is usually between Ma=5 and 6. In order to realize the wide-area flight of the scramjet, the lower limit of the starting Mach number of the scramjet is continuously expanded. However, reliable ignition and efficient combustion of hydrocarbon fuels in scramjet combustors at low flight Mach numbers (<Ma4.0) remains a challenge. The existing technologies use forced ignition and flame stabilization mechanisms as auxiliary devices, but none of these auxiliary devices can achieve low Mach number starting of the ramjet engine or the starting effect is not very satisfactory, which not only increases the complexity of the engine system but also brings corresponding problems. quality penalty. In addition, under...

Claims

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Application Information

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IPC IPC(8): C10L1/02C10L1/30
CPCC10L1/023C10L1/303
Inventor 黄小彬盛浩强李小飞刘洪
Owner SHANGHAI JIAO TONG UNIV
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