Water-cooled light-concentrating optical fiber probe used for stable section of hypersonic-speed low-density wind tunnel

Abstract

The invention discloses a water-cooled light-concentrating optical fiber probe used for a stable section of a hypersonic-speed low-density wind tunnel. Optical glass, a convex lens and an optical fiber are sequentially installed on the axis of the optical fiber probe from front to back, and sealing rings I are installed on both sides of the optical glass; a protective sleeve is installed outside the convex lens and the optical fiber in a sleeving mode, the front end of the protective sleeve closely abuts against the sealing ring I behind the optical glass, and a boss is arranged at the rear end of the protective sleeve; a shell sleeves the optical glass and the protective sleeve and is internally provided with a cooling water channel. The cooling water channel is connected with an externally-arranged cooling water system through a cooling water connector installed on the shell. The rear end of the shell and the boss at the rear end of the protective sleeve are connected by a connectingnut, and the rear end of the shell and the boss at the rear end of the protective sleeve are sealed by a seal ring III; and a step is arranged on the middle part of the shell, and a nut is installedat the step in a sleeving mode. The optical fiber probe is simple in structure and high in reliability, and can lead light generated by high-temperature and high-pressure gas in the stable section ofthe hypersonic-speed low-density wind tunnel to an optical measuring instrument.

Description

technical field [0001] The invention belongs to the technical field of hypersonic wind tunnel tests, and in particular relates to a water-cooled concentrating optical fiber probe used in a stable section of a hypersonic low-density wind tunnel. Background technique [0002] In hypersonic wind tunnels, especially high-temperature and high-pressure wind tunnel equipment such as hypersonic low-density wind tunnels and arc wind tunnels, the gas in the stable section is high-temperature and high-pressure gas. When measuring the emission spectrum or absorption spectrum of the gas in the stable section, it is necessary Install a dedicated fiber optic probe. The existing fiber optic probe does not have a cooling device, which makes the fiber probe easy to burn out, and has no light-gathering ability, which leads to low light collection efficiency of the fiber probe, which cannot meet the measurement requirements. At present, it is urgent to develop a special for hypersonic low-densi...

AI Technical Summary

Problems solved by technology

The existing fiber optic probe does not have a cooling device, which makes the fiber probe easy to burn out, and has no light-gathering ability, which leads to low light collection efficiency of the fiber prob

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