پایان نامه شبیه سازی عددی مشخصه های هیدرو دینامیکی و انتقال حرارتی یک دستگاه اجکتور مافوق صوت

فهرست:

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

          1-2 ساختار پایان نامه  ...................................................................................................................    3                               

فصل دوم: مقدمه و معرفی اجکتور و کاربردهای آن

      2-1 مقدمه...........................................................................................................................................................5

      2-2 اساس عملکرد اجکتور...............................................................................................................................7

      2-3 ساختار اجکتور...........................................................................................................................................11

           2-3-1 تعیین نسبت سطح مقطع گلوگاه دیفیوزر به گلوگاه نازل.................................................13

      2-4 انواع اجکتور­ها............................................................................................................................................14

           2-4-1 انواع اجکتور­ها از نظر سیال محرک........................................................................................14

           2-4-2 انواع اجکتور از نظر کاربرد........................................................................................................15

      2-5 آرایش اجکتورها........................................................................................................................................21

           2-5-1 تعیین سایز اجکتور و میزان بخار مورد نیاز بعنوان سیال محرک

                       در اجکتور­های تک مرحله­ایی ...............................................................................................27

           2-5-2 تعیین سایز اجکتور و میزان بخار مورد نیاز بعنوان سیال محرک

                       در اجکتور­های دو مرحله­ای  ................................................................................................30

      2-6 عوامل ایجاد اختلال در عملکرد اجکتور..............................................................................................34

      2-7 انتخاب اجکتور و نحوه پر­کردن Data Sheet.................................................................................35

      2-8 شرایط عملیاتی.........................................................................................................................................38

           2-8-1 هوای نفوذی به داخل سیستم................................................................................................39

      2-9 اطلاعات مربوط به ساختار اجکتور و کندانسور­ها..............................................................................42

      2-10 عیب یابی اجکتور...................................................................................................................................44

      2-11 کاربرد اجکتور در تبرید........................................................................................................................45

فصل سوم: مروری بر کارهای گذشته

      3-1 مقدمه..........................................................................................................................................................47

      3-2 کارهای مرتبط با طراحی اجکتور..........................................................................................................47

      3-3 طراحی تحلیلی.........................................................................................................................................50

فصل چهارم: معادلات حاکم و روش حل

      4-1 معادلات حاکم...........................................................................................................................................52

           4-1-1 مدلسازی توربولانس...................................................................................................................54

      4-2 شبیه سازی جریان به روش دینامیک سیالات محاسباتی................................................................56

      4-3 شرایط مرزی حاکم بر مسئله..................................................................................................................58

فصل پنجم: بررسی نتایج حل عددی

      5-1 بررسی استقلال نتایج عددی از مش بندی..........................................................................................  61

      5-2 مقایسه نتایج عددی با تجربی و اعتبار دهی به نتایج عددی..........................................................    61

      5-3  تحلیل جریان درون اجکتور...................................................................................................................  63

            5 – 3 – 1  بررسی تأثیر فشار ورودی ثانویه بر تغییرات ماخ ........................................................  67

            5 – 3 – 2  بررسی تأثیر فشار ورودی ثانویه بر تغییرات فشار  .....................................................  73

            4 – 3 – 3  بررسی تأثیر فشار ورودی ثانویه بر تغییرات دمایی ...................................................... 78

 پیشنهادات ..................................................................................................................................................................   83

فهرست مراجع  ...........................................................................................................................................................   

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