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Tailpipe heat transfer characteristics of Helmholtz-type valveless self-excited pulse combustor was investigated by experiments. The results show that heat transfer coefficient in the tailpipe increases with pressure amplitude and frequency. Heat transfer coefficient of oscillating flow is about 2 to 5 times of steady flow at the same mean Reynolds number. A heat transfer correlation for the oscillating...
-To overcome the problem of high carbon content in the fly ash of down-fired utility boilers using low-volatility coals, the combustion system of a 660 MWe full-scale down-fired boiler was retrofitted with many items: louver concentrators was adopted, the fuel-lean flow is laid near the wall, the F-tier secondary air is modified with an angle of declination of 20°. Industrial experiments were performed...
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