Complete the Following Problems from Turns

5310: Combustion Fundamentals Name:______Turns Chapter 6 Problems April 10, 2017

Complete the following problems from Turns:

6.1 6.2 6.3 6.4 6.6 6.7 6.8

Comments on problem 6.6: The answer to this problem is a=1.75, b=-1, and c=1. Compare these results to Figure 6.26 from Mechanics and Thermodynamics of Propulsion, by Hill and Peterson. In this figure, the loading parameter Based on your answer to problem 6.6, discuss the x-axis choice for the combustor load parameter. Note that many textbooks on combustors simply state that the exponent a is ‘empirically determined’, for example, Fundamentals of Jet Propulsion with Applications, by Flack. Now, you have a good idea of where this exponent actually comes from. Note that usually b=-1, and c=1, with some variability of a.

Figure 6.26 from Mechanics and Thermodynamics of Propulsion, by Hill and Peterson Typical blow-off limits for a gas turbine combustor =equivalence ratio in primary zone