VISCOUS FLOWS – FLUID MACHINERY

General Info

• Course Title: Viscous Flows - Fluid Machinery
• Course Code: NAOME1222
• Semester: 4th
• Course Type: S.B.¹
• Weekly Teaching Hours: 4 (Lectures)
• Credits (ECTS): 5
• Offered to ERASMUS+ students: Yes
• Course Website:https://eclass.uniwa.gr/courses/NA212/
• Professors: M. Mastrokalos

Course Content / Syllabus

Lectures: Fluid viscosity. Navier-Stokes equations. Analytical flow solutions in simple geometries. Effect of viscous terms. Measurement of fluid mechanical quantities pressure, velocity, flow rate, viscosity coefficient). Dimensional analysis. Rayleigh and Buckingham method. Similitude theory (geometrical, kinematic and dynamic similarity). Reynolds, Froude, Weber and Euler numbers. Prototype testing. Boundary layer, calculation of boundary layer thickness, flow separation, flow around bodies, drag. Laminar and turbulent flow. Turbulent boundary layer. Incompressible flow in a duct, laminar and turbulent, flow losses, Moody diagram, secondary losses, hydraulic networks and their calculation. Fluid dynamic machines, classification, (hydrodynamic machines, thermal turbomachines). Euler theorem operation, velocity triangles. Centrifugal pumps, specific speed, pumps in serial and in parallel configurations, diagrams. Characteristic curve of a hydraulic network, location of operation point. Reference to hydraulic turbines. Cavitation phenomenon. Elements of compressible flow, sound velocity, Mach number, isentropic flow, stagnation state, compressibility phenomena. Compressors, turbines, classification, isentropic and polytropic efficiency, aerothermodynamic one-dimensional analysis of thermal turbomachines.

Course Outline