پایان نامه تحلیل اثرات جریان سیال و نیرو های وارده بر پیگ ها

فهرست:

چکیده............................................................................................................................................................. 1

مقدمه............................................................................................................................................................. 2

فصل اول: کلیات.................................................................................................... 3

1-1 بیان مسأله........................................................................................................................................... 4

1-2 اهمیت و ضرورت تحقیق..................................................................................................................... 5

1-3 اهداف تحقیق......................................................................................................................................... 7

1-3-1 اهداف کلی....................................................................................................................................... 7

1-3-2 اهداف جزیی..................................................................................................................................... 8

1-4 سوالات تحقیق....................................................................................................................................... 8

1-5 فرضیه‌های تحقیق................................................................................................................................ 8

1-6 تعریف واژه ها، مفاهیم و متغیرها............................................................................................... 9

1-6-1 پیگ..................................................................................................................................................... 9

1-6-2 دلایل خرابی پیگ ها و راه های پیشگیری از آن...................................................................... 10

1-6-3 معادله برنولی (معادله انرژی).................................................................................................... 11

1-6-4 معادله ناویر– استوکس.............................................................................................................. 11

1-6-5 معادله پیوستگی.......................................................................................................................... 12

1-6-6 معادله مومنتوم.............................................................................................................................. 12

1-6-7 گروه های بی بعد............................................................................................................................ 13

1-6-8 قضیه باکینگهام.......................................................................................................................... 14

1-6-9 نیروی شناوری................................................................................................................................... 14

1-6-10 نیروی پسا و نیروی برا................................................................................................................. 15

1-6-11 نرم افزار فلوئنت........................................................................................................................... 15

فصل دوم: ادبیات وپیشینه تحقیق........................................................................ 17

2-1 مقدمه.................................................................................................................................................... 18

2-2 تاریخچه پژوهش.................................................................................................................................. 19

2-3 چارچوب نظری تحقیق........................................................................................................................   20

2-4 مدل تحلیلی تحقیق  ............................................................................................................................ 21

فصل سوم: روش تحقیق.......................................................................................... 23

3-1 مقدمه.................................................................................................................................................... 24

3-2 روش و طرح تحقیق............................................................................................................................... 24

3-3 فرآیند تحقیق......................................................................................................................................... 25

3-4 نمونه، روش نمونه گیری و حجم نمونه............................................................................................. 25

3-5 ابزار گردآوری داده ها ( اطلاعات ).................................................................................................... 25

3-5-1 روایی ابزار جمع آوری داده ها....................................................................................................... 26

3-5-2 پایایی ابزار جمع آوری داده ها...................................................................................................... 26

3-6 روش گردآوری داده ها........................................................................................................................... 26

3-7 روش تجزیه و تحلیل داده ها................................................................................................................. 27

فصل چهارم: تجزیه و تحلیل داده ها....................................................................... 28

4-1 مقدمه.................................................................................................................................................... 29

4-2 تحلیل سرعت و گرادیان فشار......................................................................................................... 30

4-3 نتایج تحلیلی و تجربی .........................................................................................................................  38

4-4 بررسی اثر نیروی پسا و تنش برشی.............................................................................................. 41

4-5 نتایج و نمودارها.................................................................................................................................... 44

4-6 بررسی اثر برا........................................................................................................................................ 48

4-7 نتایج تجربی............................................................................................................................................ 52

4-8 مدل های فیزیکی در فلوئنت........................................................................................................... 60

4-9 معادلات پایستگی جرم.................................................................................................................... 61

4-10 معادلات پایستگی مومنتوم......................................................................................................... 61

4-11 مدل های اغتشاشی........................................................................................................................ 63

فصل پنجم: نتیجه گیری و پیشنهادات .............................................................  66

5-1 تجزیه و تحلیل نتایج تحقیق................................................................................................................ 67

5-1-1 تحلیل سرعت.................................................................................................................................... 69        

5-1-2 تحلیل فشار....................................................................................................................................... 73

5-1-3 بررسی تنش برشی......................................................................................................................... 78

5-1-4 بررسی نیروهای وارد برجسم...................................................................................................... 82

5-1-5 بررسی نیروی پسای برشی.......................................................................................................... 82

5-1-6 بررسی نیروی پسای فشاری......................................................................................................... 86

5-2 مقایسه نتایج با کاربرد عملی پیگ ها...................................................................................... 94

5-3 بحث و نتیجه گیری............................................................................................................................ 95

5-4 پیشنهادات............................................................................................................................................ 99

5-4-1 حذف فرض شناوری در مدل سازی و حل عددی..................................................................... 99

5-4-2 بررسی اثر وزن جسم در شیب ها.............................................................................................. 99

5-4-3 بررسی و طراحی پیگ ها در گذر از خم ها............................................................................ 100

5-4-4 بررسی حرکت پیگ در زمان رسوب زدایی................................................................................ 100

5-4-5 تحلیل حرکت پیگ در سیال دو فازی.......................................................................................... 100

5-4-6 بررسی جریان سیال در زمان پیگ رانی برای انتقال دو فاز مجزا..................................... 101

منابع و مآخذ.......................................................................................................... 102

فهرست منابع.............................................................................................................................................. 103

چکیده‌ی انگلیسی   

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