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NACA fin type adjustable swirler for solid-fuel ramjet connection experiment

A technology of ramjet and solid fuel, which is applied in the direction of engine testing, machine/structural component testing, instruments, etc. It can solve the problems of non-adjustable swirl number and large total pressure loss of swirler, etc. Achieve the effect of reducing total pressure loss, small total pressure loss and reducing aerodynamic resistance

Inactive Publication Date: 2018-03-13
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to provide a NACA vane-type adjustable swirler used in the solid fuel ramjet tube-connected experiment, which solves the problem of the non-adjustable swirl number and the adjustable swirl number of the swirl number used in the current tube-connected test bench. The problem of excessive total pressure loss of flow device

Method used

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  • NACA fin type adjustable swirler for solid-fuel ramjet connection experiment
  • NACA fin type adjustable swirler for solid-fuel ramjet connection experiment
  • NACA fin type adjustable swirler for solid-fuel ramjet connection experiment

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Embodiment 1

[0023] combine Figure 1 to Figure 3 , a NACA vane type adjustable swirler for solid fuel ramjet tube-to-tube experiments, comprising a solid fuel ramjet central cone 1 and NACA fins 3, the solid fuel ramjet central cone 1 includes sequentially connected Conical section 1-1, cylindrical section 1-2 and converging section 1-3, assuming that the length of cylindrical section 1-2 is L, 10 NACA fin fixing planes 2 are successively and continuously distributed on the outer wall of said cylindrical section 1-2, The NACA fin fixing plane 2 is parallel to the central axis of the central cone 1 of the solid fuel ramjet, and ten NACA fins 3 are respectively fixed on the NACA fin fixing plane 2 .

[0024] The NACA fin fixing plane 2 is provided with a threaded hole 4-1 and 6 positioning pin holes 5-1, and the distance between the threaded hole 4-1 and the junction of the conical section 1-1 and the cylindrical section 1-2 is 1 / 2L, the 6 positioning pin holes 5-1 take the threaded hole 4...

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Abstract

The invention discloses an NACA fin type adjustable swirler for a solid-fuel ramjet connection experiment. The NACA fin type adjustable swirler comprises a solid-fuel ramjet central cone and an NACA fin. The solid-fuel ramjet central cone consists of a conical section, a cylindrical section and a convergent section that are connected successively; the length of the cylindrical section is set to beL; N NACA fin fixed planes are distributed on the outer wall of the cylindrical section successively, wherein the N is larger than or equal to 5 and is less than or equal to 12; the NACA fin fixed planes are parallel to the central axis of the solid-fuel ramjet central cone; and the M NACA fins are fixed on the NACA fin fixed planes respectively. Therefore, problems that the whirl number of the swirler used by the existing connection test stand can not be adjusted and the pitot losses of the swirler with the adjustable whirl number is too high can be solved.

Description

technical field [0001] The invention belongs to the field of solid-fuel ramjet connecting tube experiments, in particular to a NACA vane-type adjustable swirler used for solid-fuel ramjet connecting tube experiments. Background technique [0002] The research on the swirl of solid fuel ramjet began in the 1980s. Liu Wei mentioned a tangential hole swirl in "Swirl Combustion Characteristics Test of Solid Fuel Ramjet", which can realize the swirl intensity Adjustment, but the total pressure loss is too large, which will affect the accuracy and effect of the experiment in the case of high-speed flow. Dong Tao mentioned a self-swimming vortex swirler in the article "Numerical Simulation of Turbulent Three-Dimensional Flow Field in the Combustion Chamber of Rotating Inlet Impulse Engine", which has a better effect on airflow deflection and lower total pressure loss. Small, but the disadvantage is that the swirl intensity cannot be adjusted, and multiple swirlers need to be proce...

Claims

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Application Information

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IPC IPC(8): G01M15/02
CPCG01M15/02
Inventor 李唯暄陈雄严登超相恒升巩伦昆
Owner NANJING UNIV OF SCI & TECH
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