Ch 4. Fundamental Laws (Integral Anal.) fl Multimedia Engineering Fluids ConservationMass LinearMomentum Moment ofMomentum ConservationEnergy
 Chapter 1. Basics 2. Fluid Statics 3. Kinematics 4. Laws (Integral) 5. Laws (Diff.) 6. Modeling/Similitude 7. Inviscid 8. Viscous 9. External Flow 10. Open-Channel Appendix Basic Math Units Basic Equations Water/Air Tables Sections Search eBooks Dynamics Statics Mechanics Fluids Thermodynamics Math Author(s): Chean Chin Ngo Kurt Gramoll ©Kurt Gramoll

 FLUID MECHANICS - CASE STUDY Introduction Windmills Click to view movie (77k) The University of Oklahoma and Oklahoma State University are currently working on a long term project to explore the benefits of utilizing wind power as a renewable energy source for the state of Oklahoma. Wind comes in at a mass flow rate of 150 kg/s, hits the blades of the windmill horizontally at 20 m/s, and goes out at an angle of 60o at 50 m/s (as shown in the figure). The windmill is rotating at a speed of 2.5 rad/s. Determine the power generated by the windmill. The inner radius, r1, and outer radius, r2, are 30 m and 32 m, respectively. Questions What is the torque and power generated by the windmill? Problem Description (Idealized Flow Conditions) Approach Assume it is a steady-state process. The power generated by the shaft is       where T is the torque and ω is the angular speed of the shaft.