计量学报2016，Vol.37Issue(z1)：145-149,5.DOI:10.3969/j.issn.1000-1158.2016.z1.34
音速喷嘴喉径对边界层过渡影响研究
The Influence of Throat Diameter on the Boundary Layer Transition of the Sonic Nozzle
摘要
Abstract
Within the stagnation pressure of 0.1 ～2.5 MPa,the discharge coeffeients of 21 sonic nozzles with throat diameter of 1.921 ～ 12.444 mm are investigated.The 518 sets experimental results show that the discharge coefficient can be changed 2.3％ for the same nozzle at different stagnation pressure;the boundary layer transition occur in the 0.48 × 106 Reynolds ntmber with throat diameter of 2.713 mm of the nozzle and occur in the 0.94 × 106 Reynolds number with throat diameter of 12.444 mm,which show significantly relationship with the throat diameter.Based on the results,the empirical equation between the discharge coeffcient and Reynolds number is presented,which can be used to predict the discharge coefficient with the deviation less than 0.3％;in addition,the empirical equations between the Reynolds number of boundary layer transition and throat diameter is presented.When the extension of the formula to experimental conditions by NMIJ-2013,the prediction results and experimental results show good consistency.关键词
计量学/pVTt流量标准装置/音速喷嘴/流出系数/边界层过渡Key words
metrology/pVTt flow standard device/sonic nozzle/discharge coefficient/boundary layer transition分类
通用工业技术引用本文复制引用
李春辉,曹培娟,张翰,崔骊水..音速喷嘴喉径对边界层过渡影响研究[J].计量学报,2016,37(z1):145-149,5.基金项目
质检公益性行业科研专项(201510003) （201510003）
