Analytical Investigation on the Underexpanded Jet Issuing from Circular and Elliptic Nozzles

フォーマット:

学位論文

責任表示:

Islam Muhammad, Minarul

言語:

英語

著者名:

Islam Muhammad, Minarul  

バージョン:

ETD

概要:

The supersonic jet issuing from circular and elliptic exit of convergent-divergent nozzle has been investigated by rainbow schlieren deflectometry and modified linearized model. In experimentally, a design Mach number of 1.5 followed by a cylindrical duct with an inner diameter of 10 mm, and length of 50 mm are considered to measure the density, internal flow features of jet combing with the computed tomography. In theoretically, a … modified vortex sheet model taking viscosity into account has been proposed. The properties of Bessel’s and Mathieu functions with the first Fourier mode of eigenvalues are executed for the individual exit geometry to evaluate the explicit solution of inviscid and viscous jet separately. The embodied results of density, shock-cell spacing, and size measuring have also been examined theoretically. In comparison, the accomplished yields are shown better agreement with published data due to the aspect ratios, nozzle pressure ratios and design Mach number arbitrarily. 続きを見る

URL:

http://id.nii.ac.jp/1077/00000969/