Laboratory study of the effect of the river shore slope on the input of the lateral catchments

صاحب اثر: سازمان آب و برق خوزستان

مجری: دانشگاه شهید چمران اهواز

نوع محتوی: طرح پژوهشی

Language: Persian

استان موضوع گزارش: خوزستان

Document National Code: R-1047553

Publish: 14 November 2018

دسته بندی علمی: مهندسی آب و هیدرولوژی

Pages: 208

Publish Year: 1389

نسخه کامل Research منتشر نشده است و در دسترس نیست.

Laboratory study of the effect of the river shore slope on the input of the lateral catchments abstract

Lateral intake structure is a hydraulic structure which has to be design to divert more flow discharge and low sediment under the same flow conditions. Up to now many studies have been conducted in a rectangular channel and design criteria have been presented. The main goal of this study, which is a first study, is to conduct experimental test in a trapezoidal canal and to answer to this important question that the inclining the canal wall can effect the flow and sediment entering the offtake canal. To reach such goal, extensive experimental tests are conducted in the hydraulic laboratory of college of water sciences engineering of Shahid Chamran University. Two sets of tests were conducted. The first set, hydraulic tests, including twenty tests with no sediment. The purpose of these tests was to measure the three velocity component of flow and other flow characteristics. Then three dimensional model of SSIIM 2 was calibrated and verified by the experimental data. The SSIIM 2 model then was applied for other flow condition. In other words, 40 more result of flow characteristics was computed by SSIIM 2 model. By analysis of the flow characteristics obtain from 60 tests, the stream tube dimensions were determine and relation was developed to predict stream tube dimensions. The overall results of the first series of test confirmed that inclination of canal wall modified the flow pattern in front of intake. The second series of tests was conducted with suspended sediment feeding upstream. High dense plastic particles with specified gravity of 1.04 were used instead of suspended materials. Analysis of these data shows that inclination of canal wall can reduce the sediment entry to the intake. The most important reason for this reduction is that the stream tube width at the bed decreases. Foe example, the stream tube width at 36% of flow depth for wall slope of 1:1.5 in comparison with vertical wall, up to 80% is reduced. Since the sediment concentration in the bed is high, the weight of sediment enters the intake is reduced. For the same flow discharge ratio, the amount of sediment enters the intake for wall slope of 1:1.5 is reduced up to 65% compare to the vertical wall. The important results obtained from the study was that, the sediment entry to the intake is reaches to the minimum value, when the approaching Froud number in the main canal is 0.36. For the same flow condition, the flow discharge for wall slope of 1:1.5, is increased up to 60% compare with vertical wall.

فهرست مطالب Research

فصل اول
1-1- مقدمه.......................................................................................................................................................................1
1-2- اهداف تحقیق.........................................................................................................................................................3
1-3- فرضیات تحقیق......................................................................................................................................................3
1-4- محدوده پارامترهای تحقیق.................................................................................................................................4
1-5- نحوه نگارش رساله................................................................................................................................................4
1-6- جایگاه تحقیق حاضر.............................................................................................................................................6

فصل دوم
2-1- مقدمه.......................................................................................................................................................................7
2-2- هیدرولیک جریان در ابگیر های جانبی.............................................................................................................7
2-2-1- عوامل موثر بر شرایط هیدرولیکی جریان ورودی به ابگیر...................................................................11
2-3- تحقیقات خارج از کشور....................................................................................................................................12
2-4- تحقیقات داخل از کشور....................................................................................................................................40

فصل سوم
3-1- مقدمه...................................................................................................................................................................51
3-2- هدف از انجام ازمایش¬ها....................................................................................................................................52
3-2-1- بررسی الگوی جریان ورودی به ابگیر.......................................................................................................53
3-2-2- بررسی میزان رسوب ورودی به ابگیر........................................................................................................54
3-3- انالیز ابعادی........................................................................................................................................................54
3-3-1- پارامترهای موثر بر الگوی جریان...............................................................................................................54
3-3-2- پارامترهای موثر بر رسوب ورودی به ابگیر..............................................................................................56
3-4- طراحی ازمایش¬های الگوی جریان و رسوب ورودی به ابگیر....................................................................58
3-4-1- شیب دیواره کانال اصلی..............................................................................................................................58
3-4-2- نسبت ابگیری.................................................................................................................................................58
3-4-3- عدد فرود.........................................................................................................................................................59
3-4-4- عمق جریان.....................................................................................................................................................59
3-5- مشخصات تجهیزات ازمایشگاهی....................................................................................................................59
3-5- 1- فلوم.................................................................................................................................................................60
3-5- 2- دریچه¬¬های کشویی.......................................................................................................................................62
3-5- 3- سرریز مثلثی.................................................................................................................................................63
3-5- 4- رسوب.............................................................................................................................................................66
3-5- 5- دستگاه تزریق رسوب...................................................................................................................................67
3-5- 5-1- بررسی میزان یکنواختی ریزش دستگاه تزریق رسوب....................................................................70
3-5- 6- تله¬اندازی رسوبات.................................................................... ...................................................................71
3-5- 7- قاب متحرک..................................................................................................................................................72
3-5- 8- سیستم گردش اب......................................................................................................................................73
3-5- 9- سرعت¬سنج ADV.......................................................................................................................................75
3-5- 9-1- نقاط اندازه¬گیری سرعت........................................................................................................................78
3-6- مدل SSIIM........................................................................................................................................................80
3-6-1- محاسبات جریان............................................................................................................................................80
3-6-2- محاسبات رسوب............................................................................................................................................82
3-6-3- فایل¬های ورودی و خروجی مدل................................................................................................................83
3-7- اجرای مدل ریاضی (واسنجی و صحت-سنجی).............................................................................................83
3-8- روش انجام ازمایشات و پارامترهای برداشت شده.......................................................................................88
3-8-1- ازمایشات هیدرولیک....................................................................................................................................88
3-8-2- ازمایشات رسوب............................................................................................................................................90

فصل چهارم
4-1- مقدمه....................................................................................................................................................................93
4-2- هیدرولیک جریان...............................................................................................................................................93
4-2-1- مجرای جریان.................................................................................................................................................93
4-2-1-1- دیواره قایم..................................................................................................................................................94
4-2-1-2- شیب دیواره 5/0=z….........................................................................................................................100
4-2-1-3- شیب دیواره 1=z….............................................................................................................................105
4-2-1-4- شیب 5/1=z….....................................................................................................................................111
4-2-1-5- مقایسه شیب¬های 5/1 ,1 , 5/0 ,0z=.............................................................................................116
4-2-2- پروفیل سطح جداشده جریان..................................................................................................................123
4-2-3- قدرت جریان گردابی..................................................................................................................................127
4-2-3-1- دیواره قایم...............................................................................................................................................128
4-2-3-2- شیب دیواره 5/0=z….........................................................................................................................130
4-2-3-3- شیب دیواره 1=z….............................................................................................................................132
4-2-3-4- شیب 5/1=z….....................................................................................................................................134
4-2-3-5- مقایسه قدرت جریان گردابی در 5/1 ,1 ,5/0 ,0=z…................................................................137
4-2-3-6- تاثیر سرعت نسبی بر قدرت جریان گردابی در عمق¬های یکسان..............................................138
4-2-3-7- تاثیر عدد فرود بر قدرت جریان گردابی در عمق¬های یکسان....................................................140
4-2-4- نسبت ابگیری..............................................................................................................................................143
4-3- رسوب ورودی به ابگیر....................................................................................................................................144
4-3-1- شیب دیواره قایم.........................................................................................................................................144
4-3-2- شیب دیواره 5/0=z…..............................................................................................................................146
4-3-3- شیب دیواره 1=z…..................................................................................................................................148
4-3-4- شیب 5/1=z…..........................................................................................................................................150
4-3-5- مقایسه تاثیر عدد فرود بر در 5/1 ,1 ,5/0, 0=z….................................................................152
4-3-6- مقایسه رابطه Gr و Qrدر 5/1 ,1 ,5/0, 0=z….................................................................................156
4-4- تعیین شیب بهینه دیواره...............................................................................................................................159
4-5- مقایسه نتایج این تحقیق با سایر محققین..................................................................................................160
4-5-1- هیدرولیک....................................................................................................................................................160
4-5-1- رسوب............................................................................................................................................................161

فصل پنجم
5-1- مقدمه.................................................................................................................................................................163
5-2- ارایه توصیه¬های کاربردی جهت استفاده از نتایج تحقیق به منظور ارایه به مراجع ذیصلاح............167
5-3- پیشنهادات.........................................................................................................................................................168
فهرست منابع............................................................................................................................................................170

ضمیمه..........................................................................................................................................................................174

نمایش کامل متن

Laboratory study of the effect of the river shore slope on the input of the lateral catchments authors

محمود شفاعی بجستان (مجری اصلی)

سید مرتضی سیدیان (مجری اصلی)