A Method for Improving the Followability of Solid Particles in Hypersonic Flow Field
A solid particle and hypersonic technology, applied in the testing of machines/structural components, instruments, measuring devices, etc., can solve the problems of high scattered light intensity, insufficient particle agglomeration and mixing, and large particle size of solid particles, etc., to achieve improvement Inhomogeneity, weakening the agglomeration effect, and satisfying the effect of followability requirements
Active Publication Date: 2022-05-03
中国空气动力研究与发展中心超高速空气动力研究所
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Problems solved by technology
[0003] In 2007, M.Raffel, C.E.Willert, S.T.Wereley and J.K.Kompenhans disclosed a kind of solid particle sowing device in " Particle Image Velocimetry-A Practical Guide " (second edition) book, the solid particle of this solid particle sowing device uses The particle size is relatively large, which can meet the followability requirements of the high-speed wind tunnel flow field, but it is difficult to achieve the followability requirements of the hypersonic wind tunnel flow field
Therefore, this solid particle spreading device cannot be used for hypersonic wind tunnel tests
[0004] Due to the characteristics of solid particles with large scattered light intensity, when particle image velocity measurement technology is applied to hypersonic wind tunnel tests, solid particles with smaller particle sizes are generally used, but there are also particle agglomeration and insufficient mixing of solid particles with smaller particle sizes. The disadvantage of uniformity makes it difficult to meet the requirements of solid particles to follow the hypersonic flow field
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Embodiment 1
[0052] The holes 2 in this embodiment have an inner diameter of 50 mm, an outer diameter of 60 mm, and a height of 105 mm; the diameter of the air holes 7 on the side wall is 2 mm, and there are 18 holes in each row, 30 rows along the circumference, a total of 540 holes.
[0053] The diameter of the filter plate 3 in this embodiment is 200 mm, and the distance between the lower surface of the filter plate 3 and the upper surface of the lower cover plate 10 is 200 mm. 201 filter holes 8 are arrayed in a ring on the filter plate 3, wherein the filter hole 8 in the center has a bottom aperture of 4 mm and a top aperture of 3 mm; the remaining 200 filter holes 8 have the same size and a bottom aperture of 3 mm. The aperture at the top is 2mm.
[0054] The height of the mixing chamber 6 is 600mm, and the inner and outer diameters are 200mm and 220mm respectively; the hole diameter at the bottom of the outlet nozzle 4 is 14mm, and the hole diameter at the top is 10mm.
[0055]In th...
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Abstract
The invention discloses a method for improving the followability of solid particles in a hypersonic flow field. The method comprises the following steps: a. adding solid particles into the storage chamber of the sowing device; b. high-pressure gas enters from the air inlet of the sowing device, passes through the pores of the hole column of the storage chamber and mixes with the solid particles in the storage chamber to obtain High-speed gas I of solid particles; c. High-speed gas I enters the mixing chamber through the filter holes of the filter plate, and is further mixed in the mixing chamber to obtain high-speed gas II with solid particles; d. High-speed gas II passes through the outlet nozzle of the spreading device through The intake pipe enters the hypersonic wind tunnel. The method for improving the followability of solid particles in a hypersonic flow field of the present invention can weaken the agglomeration effect of solid particles, improve the inhomogeneity of mixing solid particles and high-pressure gas, meet the followability requirements of hypersonic particle image velocity measurement, and be of great help to the development of hypersonic wind. Hole test velocity field measurement is of great significance.
Description
technical field [0001] The invention belongs to the technical field of hypersonic wind tunnel tests, and in particular relates to a method for improving the followability of solid particles in a hypersonic flow field. Background technique [0002] Particle image measurement technology, as a non-contact and highly accurate flow field velocity field measurement technology, has developed into a mainstream test method for velocity field measurement in wind tunnel tests. [0003] In 2007, M.Raffel, C.E.Willert, S.T.Wereley and J.K.Kompenhans disclosed a kind of solid particle sowing device in " Particle Image Velocimetry-A Practical Guide " (second edition) book, the solid particle of this solid particle sowing device uses The particle size is relatively large, and the particle size of this size can meet the followability requirements of the high-speed wind tunnel flow field, but it is difficult to achieve the followability requirements of the hypersonic wind tunnel flow field. ...
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IPC IPC(8): G01M9/06
CPCG01M9/065
Inventor 张庆虎解福田林敬周钟俊许晓斌王雄赵健范孝华
Owner 中国空气动力研究与发展中心超高速空气动力研究所