ME 440- Final Exam Guide - Comprehensive Notes for the exam ( 93 pages long!)
29 Mar 2018
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Fixed volume through matter can move through boundaries. Conserved quantities in a cm: mass, momentum, and energy: extensive properties. Newton"s 2nd law: change in momentum matched by force. Energy: 1st law of thermo: de = q - w. Take some extensive property, (mass, momentum, energy) = in cm. Use the intrinsic property (per mass), , to determine cv equivalent. Relationship between speed of sound and flow speed. Disturbances generated by point source moving at speed of sound. Supersonic ow - region where the disturbance has been heard. Create conical region - marked by tangents to wave fronts. Waves coalescing at the edge of the cone can produce shock waves. Taken from energy conservation of adiabatic flows where stagnation temperature/enthalpy are constant. Stagnation pressure and entropy constant if flow is reversible. Want stagnation properties as a function of mach number for thermally and calorically perfect gases. Stagnation pressure in incompressible flow bernoulli equation.
