Full exam for Heat Transfer and Thermal Analysis in the Aerospace Engineering degree programme at Politecnico di Milano. The document covers: Heat T ransfer and Thermal Analysis - A.Y. 2017/18 - Date 17/01/2019 Surname: Name: ID number: Signature: (“matricola” or person code) Part A 1. Write the general conduction equation for a domain with constant conductivity. 2. Write the finite different approximations of the first
Full exam for Heat Transfer and Thermal Analysis in the Aerospace Engineering degree programme at Politecnico di Milano. The document covers: Heat T ransfer and Thermal Analysis - A.Y. 2017/18 - Date 17/01/2019 Surname: Name: ID number: Signature: (“matricola” or person code) Part A 1. Write the general conduction equation for a domain with constant conductivity. 2. Write the finite different approximations of the first
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Heat T ransfer and Thermal Analysis - A.Y. 2017/18 - Date 17/01/2019 Surname: Name: ID number: Signature: (“matricola” or person code) Part A 1. Write the general conduction equation for a domain with constant conductivity. 2. Write the finite different approximations of the first derivative of temperature with respect to a space direction using: a) the backward form, b) the forward form, c) the centered form. 3. Place the following materials in ascending order of conductivity: rubber, air, iron, stainless steel, copper. 4. Write the expression of the net radiative transfer between two parallel planes having constant and uniform temperature. 5. Draw the temperature profiles T (x) for the two fluids in a co-current heat exchanger in which ˙CH→∞ . 6. Write the general expressions of temperature and heat flux as a function of the radius in a hollow sphere in steady-state conditions and with heat source, before application of any b.c.. 7. Write the Biot dimensionless group, stating its physical meaning. Heat T ransfer and Thermal Analysis - A.Y. 2017/18 - Date 17/01/2019 - Part B INSTRUCTIONS - Read them very carefully! • test duration is 1 h 45’. After 35’ part A will be collected. If you finish part A in a shorter time, you can immediately move to part B; • you must answer to part A questions in the spaces provided after the questions themselves; remember also to fill in all the fields (surname, name, progressive number, ...) on the part A paper; • for part B, you can use only one foolscap paper for the final copy (additional papers will not be collected). On top-left of the first page of the foolscap paper you have to write (in a large and well-readable way): – progressive number (this is the progressive alphabetical order number the teacher will give you in each test, not your…
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