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Analytical treatments were made based on the linearized diffusion analog model. \n[1] It was clarified that parameter α obtained as a result of the analyses was an effective factor to describe the response of the operation, and α was denoted as \nα=√X=√T …(A) \nin which, \nX=w₀x/4µ₀, T=w₀²t/4µ₀ \nX:Distance represented non-dimensionally, T:time represented non-dimensionally, x:distance from the upside end of open-channel (m), t:time from the change of discharge (sec), w₀: velocity of hydraulic bore(m/sec), µ:equivalent to(hv)/2i, (hv): discharge per unit wise of channel, suffix 0 shows uniform flow and i:bottom slope. \nAlso, the phenomena of the response in the operations were transferred to down stream as dynamic, dynamic~kinematic and kinematic waves for α≪1, α≃1 and α≫1, respectively. \n[2] A simple and useful equation was derived as a result of solving the linearized diffusion analog model with in the effective range of X. \nX-T/√T={1.0(KQ=0.1, 0.1≦X≦10.0) 0.0(KQ=2/3, 0.1≦X≦10.0) -0.6(KQ=0.9, X≒1.0) \nin which, the folowing indexes were introduced to evaluate the conditions of response with the operation. 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用水システムの運用操作における流量の応答遅れ
http://hdl.handle.net/10076/6862
http://hdl.handle.net/10076/6862f27b212a-a0a7-461a-b42d-18fd1034edef
名前 / ファイル | ライセンス | アクション |
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AN002343370007502.pdf (1.6 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2007-08-27 | |||||
タイトル | ||||||
言語 | ja | |||||
タイトル | 用水システムの運用操作における流量の応答遅れ | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
著者 |
加治佐, 隆光
× 加治佐, 隆光 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The operation of discharge and delay of response in a open-channel irrigation system were discussed with mathematical analyses and experimental evalualions. Analytical treatments were made based on the linearized diffusion analog model. [1] It was clarified that parameter α obtained as a result of the analyses was an effective factor to describe the response of the operation, and α was denoted as α=√X=√T …(A) in which, X=w₀x/4µ₀, T=w₀²t/4µ₀ X:Distance represented non-dimensionally, T:time represented non-dimensionally, x:distance from the upside end of open-channel (m), t:time from the change of discharge (sec), w₀: velocity of hydraulic bore(m/sec), µ:equivalent to(hv)/2i, (hv): discharge per unit wise of channel, suffix 0 shows uniform flow and i:bottom slope. Also, the phenomena of the response in the operations were transferred to down stream as dynamic, dynamic~kinematic and kinematic waves for α≪1, α≃1 and α≫1, respectively. [2] A simple and useful equation was derived as a result of solving the linearized diffusion analog model with in the effective range of X. X-T/√T={1.0(KQ=0.1, 0.1≦X≦10.0) 0.0(KQ=2/3, 0.1≦X≦10.0) -0.6(KQ=0.9, X≒1.0) in which, the folowing indexes were introduced to evaluate the conditions of response with the operation. (1)KQ=0.1 is the beginning index of the response. (2)KQ=2/3 is the progressive state index. (3)KQ=0.9 is the ending index of the response. KQ:Discharge represented non-dimensionally, equivalent to (Q-Qb)/(Qb-Qb), Q:discharge (m³/sec), suffix b shows the uniform flow just before the operation and suffix e shows the uniform flow at the end of the response. The validity of Eq. (B) was confirmed in the transition range of the dynamic and kinematic waves. [3]The Eqs. (C) and (D) were applied to evaluate dead time D(sec) and time constant Tc(sec) in the indicial response of flow in an open-channel under various conditions. D+Tⅽ=l/w₀ …(C) w₀l/4µb-w₀²D/4µb =√w₀²D/4µb …(D) Equation(C) was derived from the condition of continuity and Eq.(D) was derived from Eq.(B). The mathematical model for evaluting dead time D and time constant Tc of the flow in an open-channel with step works in series was presented and checked using a numerical analysis. The validity of this model was confirmed within about 10 step works in a open-channel. |
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書誌情報 |
三重大學農學部學術報告 = The bulletin of the Faculty of Agriculture, Mie University 巻 75, p. 11-38, 発行日 1987-12-01 |
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ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 0462-4408 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00234337 | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
その他のタイトル | ||||||
en | ||||||
Delay of Discharge Response Operating in a Water Conveyance System | ||||||
出版者 | ||||||
出版者 | 三重大学農学部 | |||||
ノート | ||||||
Agropedia提供データ | ||||||
資源タイプ(三重大) | ||||||
Departmental Bulletin Paper / 紀要論文 |