Abstract The primary cause of mechanical-related fish injury and mortality in turbomachinery is blade strike. Fish contained the flow may strike with rotor blades fixed diffuser vanes, latter being a non-negligible factor causing damage pump system. In this study, an experiment-based correlation mutilation ratio acts as critical velocity. relation between vaned theoretical head presented functi...

The wind turbine power decreases at low speed. A flanged diffuser plays a role of device for collecting and accelerating the approaching wind, thus optimization shape presents an important way to enhance power. In this work, numerical parametric study was conducted on obtain initial optimum form diffuser. Then, Simplex algorithm is used optimal starting from obtained shape. Finally, with conven...

Title of dissertation: HOVER AND WIND-TUNNEL TESTING OF SHROUDED ROTORS FOR IMPROVED MICRO AIR VEHICLE DESIGN Jason L. Pereira Doctor of Philosophy, 2008 Dissertation directed by: Professor Inderjit Chopra Department of Aerospace Engineering The shrouded-rotor configuration has emerged as the most popular choice for rotary-wing Micro Air Vehicles (MAVs), because of the inherent safety of the de...

Operation Theatre (OT) is the most important area where precise controlled on indoor air quality is required because it is directly related to patient health and its recovery period. This work aims to study and visualize the airflow distribution of conventional flat air diffuser ventilation system and newly designed angular air ventilation system in OT. Angular Air Distribution (AAD) system is ...

Flow control has a tremendous technological and economic impact, such as aerodynamic drag reduction on road vehicles which translates directly into fuel savings, with consequent in greenhouse gas emissions operating costs. In recent years, machine learning also been used to develop new approaches flow place of more laborious methods, parametric studies, find optimal parameters few exceptions. T...

Abstrak. Kulit jeruk purut (Citrus hystrix) mengandung minyak atsiri yang bersifat insektisida. Minyak dalam sediaan aromaterapi diffuser memiliki potensi sebagai insektisida terhadap nyamuk Aedes aegypti. Penelitian ini bertujuan untuk mengkaji kulit adultisida Ae. merupakan penelitian eksperimental dengan rancangan posttest-only control group design. Uji terdiri dari 1 kelompok kontrol dan 4 ...

Supersonic ejector energy flow devices are extensively used in various applications, such as pumping, mixing, compression, etc. The conventional single-stage (SSE) design approaches inefficient for modelling an efficient because of their inefficiency minimizing mixing losses the chamber, thermodynamic shock constant area diffuser, and utilization redundant discharged momentum at exit first stag...