Preliminary Study of NO[x], CO, and Lean Blowoff in a Piloted-lean Premixed Combustor - Part 1: Experimental PDF Download
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![Preliminary Study of NO[x], CO, and Lean Blowoff in a Piloted-lean Premixed Combustor - Part 1: Experimental PDF](https://books.google.com/books/content/images/frontcover/I7B10AEACAAJ?fife=w150-h200)
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![Preliminary Study of NO[x], CO, and Lean Blowoff in a Piloted-lean Premixed Combustor - Part 1: Experimental PDF](https://books.google.com/books/content/images/frontcover/I7B10AEACAAJ?fife=w80-h100)
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Languages : en
Pages : 8
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In order to validate the models for NO(subscript x), CO, and lean blowoff discussed in part 2 of this paper, the development of an experimental datum base was initiated. Experimental data were collected from an industrial, piloted-lean premixed, natural gas fired, can combustor rig. The experiments were designed in order to minimize testing cost and time. Independent variations of inlet pressure (8 to 14 atm), inlet temperature (550 to 750 K), and residence time (13 and 23 ms) were performed in order to gain insight into the sensitivity of the emissions levels to changes in combustor operating conditions.
![Preliminary Study of NO[x], CO, and Lean Blowoff in a Piloted-lean Premixed Combustor. Part 2: Modeling PDF](https://books.google.com/books/content/images/frontcover/ZKR00AEACAAJ?fife=w80-h100)
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Languages : en
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Languages : en
Pages : 8
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The characteristic time model (CTM) is a semi-empirical model for gas turbine emissions and performance. The CTM represents the essence of the dominant physical subprocesses related to combustor performance in terms of characteristic times. Properly formulated, these characteristic times account for variations in combustor geometry, fuel characteristics, and operating conditions. In this work, the capability of the CTM to correlate the piloted-LP NO(subscript x), CO and blowoff data described in part 1 of this paper is assessed.
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Category : Mechanical engineering
Languages : en
Pages : 516
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Category : Mechanical engineering
Languages : en
Pages : 754
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Category : Airplanes
Languages : en
Pages : 576
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Languages : en
Pages :
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A study is made of the influence chemical structure of fuel has upon combustion performance through tracing the generation of carbon monoxide and oxides of nitrogen in lean, premixed, hydrocarbon-air flames. The study includes both analytical and experimental investi- gations. On the analytical side, a kinetic model is developed to predict both CO and NO time-histories in one-dimensional, premixed flames. The model is based upon the assumption of partial equilibrium in the post-flame zone while the fuel oxidation in the main reaction zone is allowed for by using a global oxidation rate equation. NO formation is assumed to be entirely via the Zeldovitch mechanism and to start in the post-flame zone. The utility of the model is judged through comparison between theoretical results and experimental data. On the experimental side, a simple burner system, supporting a one-dimensional premixed flame was designed and built. All fuels selected for investigation were pure hydrocarbons representing the main hydrocarbon types usually found in practical fuels; namely paraffins, olefins, naphthenes and aromatics. The hydrogen-to-carbon ratio ranged from 1 to 2.67 and the carbon number from 3 to 12. The experiments were performed at 1,2 and 3 atm pressure levels and 140°C inlet temperature, while the equivalence ratio was in the range 0.6 to 0.9. Flames were sampled for most stable species by a water- cooled stainless steel sampling probe. The experimental results show that the fuel structure signifi- cantly affects CO time-histories in the investigated flames mainly through influencing its generation rather than its burnout. CO burnout is shown to be mainly controlled by radical recombination processes, and the experimentally derived CO global oxidation rate equations are found not to be universally applicable. The results also show that the fuel structure influences prompt NOx formation within, and very near, the main reaction zone but that it does not influence post-equilibriu.
Author: Andrés Colorado
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Category : Fuel switching
Languages : en
Pages : 42
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Author: Swetaprovo Chaudhuri
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Category :
Languages : en
Pages : 416
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