Fundamentals of Aeronautical Engineering  Thermodynamics
MECH 1103

Winter 2014
MECH 1103 Fundamental of Aeronautical Engineering
Thermodynamic
ASSIGNMENT 1
19 The constantpressure specific heat of air at 25 oC is 1.005 kJ/kg.oC. Express
this value in kJ/kg.K, J/g.oC and kcal/kg.oC
130 The density of atmospheric air varies with i
Fundamentals of Aeronautical Engineering  Thermodynamics
MECH 1103

Winter 2014
MECH 1103 Fundamental of Aeronautical Engineering
Thermodynamic
ASSIGNMENT 2
2.14 Consider a river flowing towards a lake at an average velocity of 3 m/s at a rate
of 500 m3/s at a location 90 m above the lake surface. Determine the total
mechanical ener
Fundamentals of Aeronautical Engineering  Thermodynamics
MECH 1103

Winter 2014
MECH 1103 Fundamental of Aeronautical Engineering
Thermodynamic
ASSIGNMENT 5
5.10 Air enters the 1m2 inlet of an aircraft engine at 100 kPa and 20 oC with a
velocity of 180 m/s. Determine the volume flow rate, in m3/s, at the engines
inlet and the mass
Fundamentals of Aeronautical Engineering  Thermodynamics
MECH 1103

Winter 2014
MECH 1103 Fundamental of Aeronautical Engineering
Thermodynamic
ASSIGNMENT 3
3.27 A pistoncylinder device contains 0.85 kg of refrigerant134a at 10 oC. The
piston that is free to move has a mass of 12 kg and a diameter of 25 cm. The
local atmospheric p
Fundamentals of Aeronautical Engineering  Thermodynamics
MECH 1103

Winter 2014
MECH 1103 Fundamental of Aeronautical Engineering
Thermodynamic
ASSIGNMENT 6
6.21 An automobile engine consumes fuel at a rate of 22 L/h and delivers 55 kW of
power to the wheels. If the fuel has a heating value of 44,000 kJ/kg and a
density of 0.8 g/cm3
Fundamentals of Aeronautical Engineering  Thermodynamics
MECH 1103

Winter 2014
MECH 1103 Fundamental of Aeronautical Engineering
Thermodynamic
ASSIGNMENT 4
4.25 An ideal gas undergoes 2 processes in a pistoncylinder device as follows:
12 Polytropic compression from T1 and P1 with a polytropic exponent n
and a compression ratio of
Fundamentals of Aeronautical Engineering  Thermodynamics
MECH 1103

Winter 2014
MECH 1103 Fundamental of Aeronautical Engineering
Thermodynamic
ASSIGNMENT 7
7.41
A pistoncylinder device contains 1.2 kg of saturated water vapor at 200 oC.
Heat is now transferred to steam, and steam expands reversibly and
isothermally to a final pres
Fundamentals of Aeronautical Engineering  Thermodynamics
MECH 1103

Winter 2014
MECH 1103 Fundamental of Aeronautical Engineering
Thermodynamics
Introduction
6 January 2014
Department of Mechanical and Aerospace Engineering
Hong Kong University of Science and Technology
Contents
Introduction
Forms of Energy
Thermodynamic State
Therm