翻訳と辞書 Words near each other ・ Blaenwern ・ Blaenycoed ・ Blaesheim ・ Blaesia atra ・ Blade pitch ・ Blade Ridge ・ Blade Runner ・ Blade Runner (1985 video game) ・ Blade Runner (1997 video game) ・ Blade Runner (a movie) ・ Blade Runner (disambiguation) ・ Blade Runner (soundtrack) ・ Blade Running ・ Blade server ・ Blade Show ・ Blade solidity ・ Blade steak ・ Blade Symphony ・ Blade the Warrior ・ Blade Thompson ・ Blade Thomson ・ Blade Warrior ・ Blade Wars ・ Bladedance of Elementalers ・ Bladel ・ Bladel en Netersel ・ Bladeless fan ・ Bladelets ・ BladeMaster ・ Blademaster Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Blade solidity ： ウィキペディア英語版 Blade solidity Blade solidity is an important design parameter for the axial flow impeller and is defined as the ratio of blade chord length to pitch. *Blade Solidity = c/s Where *$s=\; \backslash pi\; r\_/\; Z\_$ *$r\_$ is the mean radius *$Z\_$ is blade number * Cord length c is the length of the chord line * s is pitch In case of an axial flow impeller mean radius is defined in terms of hub ($r\_h$,inner radius) and tip radius ($r\_t$,outer radius) as : *$r\_=\; (+\; r\_^2)/2)^$ Blade solidity affects various turbomachinery parameters. So to vary those parameters one needs to vary blade solidity but there are some limitations imposed by Aspect ratio (wing) (span/chord), pitch. If an impeller has few blades i.e high pitch it will result in less lift force and in a similar manner for more blades i.e. very low pitch, there will be high drag force. Blade solidity should not be confused with rotor solidity, which is the ratio of the total area of the rotor blades to the swept area of the rotor. ==Flow over isolated airfoil== Blade solidity is an important parameter that inter relates turbomachine parameter to airfoil parameter .Lift and drag coefficient for an airfoil is inter related to blade solidity as shown : * $C\_L\; =\; 2(s/c)(\backslash tan\backslash beta\_1\; -\; \backslash tan\; \backslash beta\_2)cos\backslash beta\_m$ * $C\_d\; =\; \backslash left(\; \backslash frac\; \backslash right)\; \backslash left(\backslash frac\; \backslash right)$ where *$C\_L$is lift coefficient *$C\_d$ is the drag coefficient * $\backslash beta\_1$ is the inlet flow angle on the airfoil * $\backslash beta\_2$ is the outlet flow angle on the airfoil * $\backslash beta\_m$ is the mean flow angle * $W\_1$ is inlet flow velocity i.e relative to airfoil *$W\_m$ is mean flow velocity * $\backslash Delta\; p\_0$is the pressure loss * $\backslash tan\; \backslash beta\_m\; =\; \backslash frac\; (\backslash tan\backslash beta\_1\; +\; \backslash tan\backslash beta\_2)$ In an airfoil the mean line curvature is designed to change the flow direction ,the vane thickness is for strength and the streamlined shape is to delay the onset of boundary layer separation, taking all the design factors of an airfoil resulting forces of lift and drag can be expressed in terms of lift and drag coefficient. *$F\_L\; =\; C\_Lbc\; \backslash left(\backslash frac\; \backslash rho\; W\_m^2\backslash right)$ *$F\_d\; =\; C\_dbc\; \backslash left(\backslash frac\; \backslash rho\; W\_m^2\backslash right)$ :b is the wingspan :c is the chord length 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Blade solidity」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.