بررسی آزمایشگاهی ضریب آبگذری سرریز کلید پیانویی با تاج شیب دار ناپیوسته

نوع مقاله : مقاله کامل (پژوهشی)

نویسندگان

1 دانشگاه کیوتو ژاپن

2 استاد هیدرولیک، دانشگاه تربیت مدرس

چکیده

سرریز کلید پیانویی نوعی سرریز غیرخطی است که جهت بهبود ظرفیت آبگذری سدها طراحی‌شده است. ازآنجاکه طول تاج سرریز کلیدپیانویی پارامتر مهم و تأثیرگذار بر ظرفیت تخلیه‌ی سرریز می باشد، پژوهش حاضر با اصلاح شیب دیواره‌ها و افزایش طول تاج سرریز، به دنبال راهکاری جهت افزایش بهره‌وری سرریز‌ کلید‌پیانویی می‌باشد؛ بطوریکه به‌واسطه‌ی اصلاح شیب دیوارهی سرریز کلیدپیانویی بتوان در کانال‌ها و رودخانه‌ها جهت آبگیری از آن در مواقع کم آبی نیز بهره برد. به همین منظور آزمایشات، در فلومی بر روی دو سرریز کلید پیانویی با نسبت هندسی (B/W=2/3) و شیب دیواره‌های جانبی صفر (مدل (Rec-Base و 10 درجه (مدل Rec-B1) در آزمایشگاه هیدرولیک دانشگاه تربیت مدرس تهران طراحی و صورت پذیرفت. نتایج نشان داد که تراز سطح آب بالادست مدل (Rec-B1) نسبت به مدل (Rec-Base)، حدود 8 درصد افزایش‌یافته است، درحالیکه ضریب آبگذری مدل (Rec-B1)، بطور متوسط حدود 7 درصد نسبت به مدل(Rec-Base) افزایش‌یافته است. همچنین کارایی مدل Rec-B1 به‌طور متوسط در حدود 7 درصد بیش از مدل Rec-Base می باشد.

کلیدواژه‌ها

موضوعات


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