Combustion chamber design

Principles of (A) DI (direct-injection) and (B) IDI (indirect-injection) combustion chamber designs. 

The laboratory furnace, illustrated in Figure 1, has been described in detail elsewhere (19). The combustion chamber design is similar to that of Pershing and Wendt (20). It consists of a vertical cylinder 1.0 m long and 0.2 m inside diameter cast from alumina refractory cement. A series of convective heat exchangers, also 1.0 m long and 0.2 m inside diameter, are mounted directly below the combustor. The combustor is fired at a rate of 8 to 12 Kw, providing a residence time of 1 to 2 seconds in the combustion chamber. 

Figure 5. Effect of Combustion Chamber Design on Relative Antiknock Rating of Sensitive Fuel...

NOx Reduction of Biomass Combustion by Optimized Combustion Chamber Design and Combustion Control... 

Fig. 5 A schematic of a typical waste incineration facility. Although incinerators have similar components indicated in the figure, combustion chamber designs vary significantly from application to application. (From Ref...

Today, combustion catalysts that can operate up to 900-1000 °C have been developed and studied in both laboratory- and pilot-scales. Still, two catalyst features have not been fully developed. To begin with, a catalyst system that can operate above 1000 °C for one year of operation or more. Secondly, a catalyst system that can ignite natural gas at compressor outlet temperatures of approximately 200-400 °C. However, several combustion chamber designs have been proposed that utilize the features of catalytic combustion, but which operate the catalyst module at approximately 500-1000 °C. Here, a homogeneous zone is used to increase the temperature of the gas to the final maximum temperature. These designs are described in detail in Section 5 of this review. 

There are many types of combustion chamber designs which manufacturers use to mix fuel and air. There are claimed advantages for each type. These may be fuel economy, ability to make use of simpler fuel systems, wide speed-range coverage, or firing pressure minimization. These systems generally fan into an open-chamber (Fig. 6.90) or divided-chamber (Fig. 6.91) category. 

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