ISSIQLIK ALMASHINUVI QURILMALARINING OQIM KANALLARI GEOMETRIYASINI CFD MODELLASHTIRISH ASOSIDA OPTIMALLASHTIRISH
Abstract
Mazkur maqolada issiqlik almashinuvi qurilmalarining oqim kanallari geometriyasini hisoblash suyuqlik dinamikasi — CFD modellashtirish asosida optimallashtirish masalasi tadqiq etilgan. Tadqiqotning asosiy maqsadi issiqlik uzatish koeffitsiyentini oshirish, qurilmaning gidravlik qarshiligini kamaytirish va umumiy termogidravlik samaradorlikni yaxshilash imkonini beruvchi oqim kanali konstruktiv parametrlarini aniqlashdan iborat. Ishda plastinali va ixcham issiqlik almashinuvi qurilmalari uchun kanal balandligi, kengligi, gidravlik diametri, burilish burchagi, to‘lqinsimonlik darajasi, yo‘naltiruvchi qovurg‘alar oralig‘i hamda oqimning kirish-chiqish konfiguratsiyasi asosiy geometrik omillar sifatida qabul qilindi. Hisoblash modeli massa, impuls va energiyaning saqlanish tenglamalariga asoslangan bo‘lib, turbulent oqim uchun k–ε va k–ω SST modellarining qo‘llanish imkoniyatlari tahlil qilindi. Optimallashtirishda issiqlik uzatish koeffitsiyenti, Nusselt soni, bosim yo‘qotilishi, ishqalanish koeffitsiyenti va termogidravlik samaradorlik mezonlari birgalikda baholandi. Tahlil natijalariga ko‘ra, kanal geometriyasini faqat issiqlik uzatishni oshirishga yo‘naltirish bosim yo‘qotilishini keskin ko‘paytirishi mumkin. Shu sababli Pareto-optimal yechimlar asosida ko‘p mezonli optimallashtirish yondashuvi maqsadga muvofiq ekani asoslandi. Taklif etilgan CFD-optimallashtirish metodikasi issiqlik almashinuvi qurilmalarini loyihalash, energiya sarfini kamaytirish, materialdan foydalanish samaradorligini oshirish va sanoat qurilmalarining ekspluatatsion ko‘rsatkichlarini yaxshilash uchun amaliy ahamiyatga ega.
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References
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