Premixed fuel nozzle with isolation layer
A fuel nozzle and isolation layer technology, which is applied in the combustion chamber, combustion method, combustion equipment and other directions, can solve the problems of the decrease of the thermal cycle efficiency of the combustion chamber, the change of the detonation wave propagation mode, and the decrease of the specific impulse of the engine, so as to improve the thermal cycle. Efficiency, temperature reduction, simple structure effect
Pending Publication Date: 2021-02-05
上海市应用数学和力学研究所
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
When the proportion of fuel reacting in the form of deflagration in the detonation engine combustion chamber increases, the thermal cycle efficiency of the combustion chamber decreases
[0005] One of the main loss mechanisms of the propulsion performance of the rotary detonation engine is that the propellant is consumed prematurely in the form of deflagration before the detonation wave passes through, and the fuel burns in advance, resulting in a decrease in the specific impulse of the engine, which may induce a change in the propagation mode of the detonation wave, and then causing severe fluctuations in the flow field
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment
[0035] Based on the above idea of premixed fuel nozzle with isolation layer (also known as stratified injection), the physical model of the combustor used in the design comparison is as follows image 3 As shown, the axial length of the combustion chamber is 100mm, the inner diameter is 45mm, the outer diameter is 50mm, and the width of the combustion chamber is 5mm. Fifty fuel nozzles are equally spaced on the inlet interface, separated by inert gas nozzles. When the inert gas nozzle is open, it is fuel stratified injection mode. When the inert gas nozzle is closed (set to slide wall), it is fuel interval injection mode. The average width of the fuel nozzle is 4mm, and the average width of the inert gas nozzle is 2mm. It is assumed that the fuel nozzle is connected to a constant total pressure air tank through a converging nozzle to provide premixed fuel to the combustion chamber. The total injection pressure is 1MPa, and the total temperature is 600K. The fuel nozzle i...
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
Login to View More Abstract
The invention discloses a premixed fuel nozzle with an isolation layer. A plurality of fuel nozzles are respectively arranged at an inlet of a combustion chamber of a rotary detonation engine, and a plurality of inert gas nozzles are arranged on two sides of each fuel nozzle. Under the condition that high-temperature combustion products exist in the detonation combustion chamber, premixed fuel andinert gas are supplied in a layered mode, so that the contact area of the premixed fuel and the high-temperature products is reduced, then the deflagration combustion proportion of the fuel is reduced, and the heat efficiency and the propelling stability are improved.
Description
technical field [0001] The present invention relates to a premix fuel nozzle with a separation layer. Background technique [0002] In the rotating detonation combustor, the fuel should be combusted as much as possible in the form of detonation in order to meet the design purpose. However, at the interface between the fresh fuel and the detonation products, there is a deflagration combustion phenomenon. Since the deflagration combustion behavior is close to the isobaric combustion process, its thermal efficiency is lower than that of the detonation in the isovolumic combustion process. Therefore, the fuel knock phenomenon will reduce the thermal efficiency of the engine. In particular, it may induce a change in the propagation mode of the detonation wave, causing a great instability of the engine thrust. The occurrence of deflagration can be effectively reduced by using inert gas to isolate fresh fuel and detonation products. As such, premixed fuel nozzles with isolation ...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/58F23R3/28
CPCF23R3/58F23R3/286
Inventor 丁珏杨小权翁培奋雷知迪
Owner 上海市应用数学和力学研究所