Not exist
Saleh R. Abdussalam Gashoot, A.K.Misra(7-2003)

Abstract Estimation of wind characteristics is considered as the first essential step to evaluate a wind energy project based on information about all aspects of the implementation and operation of the project. It's therefore necessary to have detailed knowledge of the wind to design a suitable wind turbine for a certain zone and also to estimate its performance accurately. The first step in this thesis is study the wind energy and wind assessment in the selected site (Zuara) based on the available wind data, which are obtained from the representative meteorological station. The second step in this thesis is study is to design a suitable horizontal axis wind turbine. Design (HAWT) to achieve satisfactory levels of performance starts with knowledge of the aerodynamic forces acting on the blades. The blade element momentum theory (BEM) is applied for HAWT blade design and to predict the performance of the rotor. A computer program for HAWT blade design and its performance analysis is belt. The input of this program is: power required from a turbine, number of blades, design wind velocity, design tip-speed ratio and properties of the selected airfoil. While the output are: blade geometry parameters (chord and twist distribution), power, torque and thrust coefficients versus tip-speed ratios. This study indicates that capacity factor on the Zuara site equal 3 and it is seen that possible to designed wind turbine to extracting the power from the wind with satisfactory levels of performance in the selected site
فرج الأخضر شنشن (2014)

تهدف الدراسة في هذا المشروع إلي تطوير نموذج تحليلي أحادي البعد يدرس دورة واحدة لمحرك التفجير النابض (PDE). النموذج مبني أساسا على قيم الضغط عند جدار أنبوب التفجير. وقد تمت المقارنة مع بعض النتائج النظرية الموجودة في أحد المراجع لغرض تقييم والتحقق من نتائج النموذج الحالي.معاملات الأداء والتي تشمل، نسبة صرف الوقود، وحدود التردد، ونسبة الوزن إلي قوة الدفع، تم حسابها في نطاق ضروف التشغيل المقترحة. أما الجوانب الإنشائية والتي تتضمن، إجهاد الخضوع، ووزن المحرك، وسرعة تردد الموجة، تم حسابها لغرض تحديد الإطار العام للتصميم المبدائي للمحرك. تم أستخدام الإكسل (Excel sheet) في برمجة النموذج الرياضي في هذا المشروع حيت تم تصميم حاسبة أستخدمت في إيجاد المعاملات التصميمية.لغرض الأعمال المستقبلية فقد تم وضع الإطار المبدائي للمحرك من ناحية الأداء والعوامل الأنشائية. Abstract The objective of the present work is to develop a general one-dimensional analytical model for the impulse of a single cycle pulse detonation engine (PDE). The model is based on the history of pressure at the thrust surface of the detonation tube. The model is validated against theoretical results that obtained in the literature.Performance parameters include, thrust specific fuel consumption, frequency limits, and thrust to weight ratio have been estimated over a range of operating conditions. The structural aspects, such as yield stress, engine weight, and flexural wave are also considered and obtained in this work.The calculation routines are ideally suited to excel programs sheet calculator, and hence the designed model has been laid out according to this calculator outputs.For further work, preliminary design study is identified for both performance and structural aspects.
عبدالحكيم ميلاد القموني (2010)