Solution 3
Given: Thermal conductivity and dimensions of bars of two materials Sketch: Two thermal circuits (one series and one parallel) [8 points] Find: Eective thermal conductivity in two directions Modes of Heat Transfer: Conduction Assumptions: Stead
MAE 112 PROPULSION FINAL EXAM March 19, 2009 Do all four problems in 120 minutes. Books, notes and calculators can be used freely. 1. An afterburner has an exhaust temperature of 3000R into a nozzle and operates at 4.5 atmospheres of pressure. The afterbu
Due: January 15, 2010 MAE 112 Winter 2010 Homework Assignment #1
1.
(a) Calculate AF at stoichiometric condition (AFst) for ethyl alcohol C2H5OH (aka ethanol) burning in air. AF is the ratio of mass flow of air to mass flow of fuel. Also, calculate FA = 1
Due: January 22, 2010 MAE 112 Winter 2010 Homework Assignment #2 1. Consider a rocket engine that uses liquid oxygen and liquid ethanol (C2H5OH) fuel. The oxygen mass-flow rate is 2.2 times greater than the fuel mass-flow rate. Ethanol is stored at 298K w
Due: January 29, 2010 MAE 112 Winter 2010 Homework Assignment #3 1. Consider a jet engine flying at a Mach number of 1.45. A normal shock sits at the entrance of the divergent diffuser. The diffuser entrance cross-sectional area is 2.75 ft2. The ambient c
Due: February 5, 2010 MAE 112 Homework Assignment #4 1. Suppose a particular jet engine had an entrance cross-sectional area of 2.0 ft2 and an exit cross-sectional area of 6.0 ft2. The air-fuel mass ratio is 30 at one particular operating point. The fligh
Due: February 19, 2010
MAE 112 Homework Assignment #5 1. Suppose a particular compressor has a compression ratio P2/P1 = 8 and the incoming air temperature is 300K. If the adiabatic efficiency is .94, what is (a) the final temperature? (b) the average pol
MAE 112 Propulsion Homework Assignment #7 Due: March 5, 2010 1. Consider an ion rocket with a 1200 volt drop in potential between the accelerating electrodes placed 60 centimeters apart. Xenon of atomic weight 54 is the propellant. The charge to mass rati
MAE 112 Propulsion Homework Assignment #8 Due: Wednesday, March 10, 2010 1. Consider a crossed-field two-dimensional electromagnetic accelerator. Argon gas with molecular weight of 40 and = 5/3 is the propellant. The gas temperature (T = 8750 K) and the c
MAE 112 Propulsion Homework Assignment #6 Due: February 26, 2010 Suppose we had two parallel flows, one at a stagnation temperature of 1925R and the other at 2900R. Each flow had a stagnation pressure of ten atmospheres, a value of = 1.25, and a value of
MAE 112 PROPULSION MIDQUARTER EXAM February 10, 2010 Do all three problems in one-hundred-and-ten minutes. Books, notes and calculators can be used freely. No computers or communication devices are allowed. If tables or charts are used rather than formula
Problem 2
A large beaker with a shallow pool of liquid Heptane of depth l, is under an array of mercury lamps which provide an energy ux of qs , as shown in the gure. From experiments it was determined that the energy ux inside the heptane pool decays as
MAE 112 PROPULSION Winter 2010 Catalog Data:
Application of thermodynamics and fluid mechanics to basic flow processes and cycle performance in propulsion systems: gas turbines, ramjets, scramjets, and rockets. Prerequisite: MAE135. (Design units: 1) The