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Register a new userComparison of the Aerodynamic Characteristics of a Twisted Overhead Transmission Line with Cylindrical Line
مقارنة الخواص الأوروديناميكة لناقل هوائي مجدول مع ناقل اسطواني
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عرض هذا البحث دراسة للخصائص الأيروديناميكية متضمنة الأثر الذيلي المضطرب المتشكل خلف النواقل الهوائية المجدولة و مقارنته بالأثر الذيلي لناقل اسطواني . بينت الدراسة تأثير الشكل الخارج للناقل المجدول على نمط الجريان و انفصال الطبقة الحدية و شكل الأثر الذيلي الناتج. حيث لوحظ اختلاف نمط الجريان بين الناقلين و خاصة لناحية توزع الضغط و القوى الناتجة المؤثرة. كما تطرقت الدراسة للضجيج الناتج عن الجريان، حيث تبين أن الضجيج الناتج عن الناقل المجدول أكبر منه لحالة الناقل الاسطواني . و يعزى ذلك لانفصال الطبقة الحدية.
This research showed a study of the aerodynamic characteristics including the turbulent wake behind a twisted overhead transmission line in comparison to the wake behind a cylindrical transmission line. The study showed the effect of the shape of the twisted transmitter on the slow pattern and the boundary layer separation and the shape of the wake. A difference was noted between the two transmitters and especially the pressure distribution and the resulting force. The study also dealt with the noise caused by the flow; the twisted transmitter showed higher sound pressure levels SPL compared to the cylindrical transmitter. This is due to the boundary layer separation.
References used
List V., “Mechanical Design of Overhead transmission Lines”, STL PUBLISHERS of TECHNICAL LITERATURE 671, 1963
Ghannoum E., "Evolution of IEC 60826 ``Loading and Strength of Overhead Lines'', ASCE Library, 2012
Retallack R.L, Fry T.R, Popeck C., “Fault and Load Current Testing of a Bundle Conductor Spacer” IEEE Xplore, 1963
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