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An industrial application uses a combustor fueled with preheated air and liquid kerosene (which can be simulated by liquid n-decane, C10H22 ). The combustion process
An industrial application uses a combustor fueled with preheated air and liquid kerosene (which can be simulated by liquid n-decane, C10H22 ). The combustion process occurs at a constant pressure of 1 atm. a. (20 pts) Assuming no dissociation and only main combustion species, determine the temperature of the products if the air is preheated to 600K and the liquid fuel is injected at 400 K for an equivalence ratio of 0.7 . Use: h(400K)=249,659kJ/kmol(enthalpyforn-decanevapor@400K)hfg=277kJ/kg(enthalpyofvaporizationforn-decane@400K) b. (20 pts) Assuming that a flame temperature at an equivalence ratio of 1.2 is equal to that of a flame at an equivalence ratio equal to 0.7 , provide a set of equations to determine the main combustion product composition for the fuel rich case. Provide only your unknown variables and numbers in your set of equations. c. (10 pts) How would the composition determined in part (b) change if: i. the inlet temperature was increased? ii. the process was carried out at 10atm ? d. (15 pts) Draw a Tad vs. equivalence ratio curve and explain the plot and why it looks the way it does. Is the assumption made in part (b) that a flame temperature at an equivalence ratio of 1.2 is equal to that at an equivalence ratio of 0.7 appropriate
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