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Propellant charge exhaust plume flow velocity measurement apparatus

A technology of flow velocity measurement and propellant, which is applied in the direction of measuring device, fluid velocity measurement, velocity/acceleration/shock measurement, etc. It can solve the problem of poor velocity measurement effect and the inability to accurately characterize the flow velocity characteristics of propellant charge exhaust plume, etc. problems, to achieve the effect of broad application prospects

Inactive Publication Date: 2016-08-17
XIAN MODERN CHEM RES INST
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

This feature of LDV and PIV makes it less effective for propellants with less particle content in the plume, and additional tracer particles need to be introduced
In addition, the flow velocity of the fluid cannot be completely consistent with the movement velocity of the particles in it, that is, LDV and PIV cannot accurately characterize the flow velocity characteristics of the propellant charge exhaust plume

Method used

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  • Propellant charge exhaust plume flow velocity measurement apparatus
  • Propellant charge exhaust plume flow velocity measurement apparatus
  • Propellant charge exhaust plume flow velocity measurement apparatus

Examples

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Embodiment Construction

[0023] The measurement device is designed according to the characteristics of propellant charge plume velocity measurement, including a tunable semiconductor laser, a laser control system, an optical system, and a data acquisition and processing unit. The signal generator in the laser control system gives the laser a sawtooth-like tuning current signal through the current control unit, and at the same time keeps the temperature of the laser within the optimum working temperature range through the temperature control unit. Under the action of the current given by the current control unit, the tunable semiconductor laser emits laser light whose wavelength varies with the tuning current; the central wavelength of the laser light emitted by the laser is determined by the laser itself. In the measurement of the flow rate of the propellant charge exhaust plume Among them, the common water in the plume (H 2 O), carbon oxides (CO 2 , CO, etc.), nitrogen oxides (NO 2 , NO, N 2 O, et...

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PUM

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Abstract

The invention discloses a propellant charge exhaust plume flow velocity measurement device, which solves the problem that the existing laser Doppler velocimeter and particle image velocimeter can only measure the particle velocity in the fluid, rely on tracer particles and cannot be accurately characterized Fluid velocity issues. The invention includes a tunable semiconductor laser, a laser control system, an optical system, and a data acquisition and processing unit. The invention can realize the measurement of the exhaust plume flow velocity of the solid, liquid, colloid and paste propellant charge within the high precision and wide velocity measurement range (0-3000m / s). The invention is applicable to the measurement of the flow velocity of the exhaust plume generated when different kinds of propellants are burned in the engine, and has important significance for the optimization of the propellant composition, the design of the propellant charge and the design of the engine.

Description

technical field [0001] The invention relates to a flow rate measuring device, which is suitable for testing the exhaust performance of propellant charges. Background technique [0002] The propellant charge exhaust plume is the combustion and cracking product of the propellant discharged through the nozzle of the engine after ignition, which contains smoke and flame, and is also accompanied by violent physical and chemical change processes, such as turbulence, electron excitation, ionization, and secondary secondary burn. The flow velocity and variation characteristics of propellant charge exhaust plume are important parameters reflecting the performance of propellant and engine, and play an important role in propellant formulation optimization, propellant charge design and engine design. At present, the main means for measuring the velocity of the propellant charge exhaust plume include laser Doppler velocimetry (LDV) and particle image velocimetry (PIV). Droplet) to char...

Claims

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Application Information

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IPC IPC(8): G01P5/26
CPCG01P5/26
Inventor 杨燕京仪建华孙美赵凤起景建斌罗阳金辉王长健许毅解珍珍安亭孙志华姚德龙
Owner XIAN MODERN CHEM RES INST
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