文档介绍：: .
Jour2005, engine
overheating has been a primary concern for the Melbourne University Racing
(MUR)team at the Formula SAE-A Endurance Event, which has lead to both
performance and reliability issues. The engine cooling systems are critical for the
car to run smoothly, a failure in the cooling system would mean a failure in the
overall car. Use of a cooling system with excess capacity does not provide a
solution either as this adds unnecessary cost and weight. Thus, the design of an
engine cooling system is a task in optimization [1].
Many factors contribute to overheating; the most critical is the inadequate
management of airflow through the radiator [1]. As the FSAE-A event is held during
94Computational Flow Modelling of Formula-SAE Sidepods95
Nomenclatures
C Coefficient of Drag
D
C Coefficient of lift
L
ε –NTU Epsilon-NTU method
F Drag force, N
D
F Lift force, N
L
h Heat transfer coefficient
k Pressure loss coefficient
L
m& Mass flow rate of air, kg/s
∆p Pressure rise across radiator fan, Pa
F
∆p Pressure drop across radiator, Pa
R
Q Heat transfer, W
v Sidepod inlet velocity, m/s
v Swirl velocity, m/s
s
r Polynomial constant
n
y+ Dimensionless wall distance
Greek Symbols
α Angle of attack, deg.
during the summer months, temperatures on the track can rise considerably.
Previous MUR teams have fallen victim to this overheating issue at FSAE-A
competitions. In 2008, alone, two engines were damaged as a result of poor heat
management. Consequently, previous MUR drivers have been unable to perform
competitively during the end