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Hai Zhang
Tsinghua University
127Publications
19H-index
1,211Citations
Publications 112
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Abstract The classification performance of model coal mill classifiers with different bottom incoming flow inlets were experimentally and numerically studied. The flow field adjacent to two neighboring impeller blades were measured using the particle image velocimetry technique. The results showed that the flow field adjacent to two neighboring blades with the swirling inlet was significantly different from that with the non-swirling inlet. With the swirling inlet, there was a vortex located bet...
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#1Wenfeng Shen (THU: Tsinghua University)H-Index: 3
#2Yang Zhang (THU: Tsinghua University)H-Index: 13
Last.Hai Zhang (THU: Tsinghua University)H-Index: 19
view all 4 authors...
ABSTRACTEffects of hydrogen (H2), methane (CH4), ethylene (C2H4) and propylene (C3H6) blending on the ignition delay time of n-heptane/toluene mixtures were numerically studied under both homogeneo...
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#1Lilin Hu (THU: Tsinghua University)
#2Yang Zhang (THU: Tsinghua University)H-Index: 13
Last.Junfu Lyu (THU: Tsinghua University)H-Index: 4
view all 9 authors...
Abstract Combustion and NOx emission characteristics of a bituminous coal (BC) blended with semi-coke (SC) are investigated using a Thermogravimetric Analyzer (TGA) and Drop Tube Furnace (DTF) at a different SC blending ratio Xsc. TGA results show that BC and SC have similar mass loss patterns but BC-SC blends have a second trough on their DTG curves. The addition of semi-coke increases ignition and burnout temperatures of the blends, but barely affects the burnout rate. Within 95% mass loss, th...
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#1Wenfeng Shen (THU: Tsinghua University)H-Index: 3
#2Yang Zhang (THU: Tsinghua University)H-Index: 13
Last.Hai Zhang (THU: Tsinghua University)H-Index: 19
view all 6 authors...
Abstract Pyrolysis experiments of typical C8 hydrocarbons, including the straight-chain, branched-chain, cyclic and aromatics structure ones, were carried out using a jet-stirred reactor (JSR) at 1 atm and temperature from 873 K from 1173 K for residence time from 0.2 s to 2.0 s. To assess the carbon number effect, studies were also conducted on two C16 alkanes. The mole fractions of light gases, including H2, main C1–C3 alkanes and C2–C4 alkenes in the pyrolysis product, were measured by a gas ...
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#1Weiliang Wang (THU: Tsinghua University)H-Index: 6
#2Zheng Li (THU: Tsinghua University)H-Index: 23
Last.Weidou Ni (THU: Tsinghua University)H-Index: 22
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As the main power source of China, coal-fired power industry has achieved a great progress in installed capacity, manufacturing technologies, thermal efficiency, as well as pollutant control during the past century. With the fast development of renewable energies, coal-fired power industry is experiencing a strategic transformation. To specify the development of coal-fired power industry, its development history is reviewed and the technical progresses on aspects of thermal efficiency, pollutant...
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#1Haoshu Shen (THU: Tsinghua University)H-Index: 2
#2Yuxin Wu (THU: Tsinghua University)H-Index: 14
Last.Guangxi Yue (THU: Tsinghua University)H-Index: 17
view all 6 authors...
1 CitationsSource
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#1Weiliang Wang (THU: Tsinghua University)H-Index: 6
#2Junfu Lyu (THU: Tsinghua University)H-Index: 4
Last.Weidou Ni (THU: Tsinghua University)H-Index: 22
view all 6 authors...
Coal-fired power is the main power source and the biggest contributor to energy conservation in the past several decades in China. It is generally believed that advanced technology should be counted on for energy conservation. However, a review of the decline in the national average net coal consumption rate (NCCR) of China’s coal-fired power industry along with its development over the past few decades indicates that the upgradation of the national unit capacity structure (including installing ...
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#1Yang Zhang (THU: Tsinghua University)H-Index: 13
#2Xiehe Yang (THU: Tsinghua University)
Last.Junfu Lyu (THU: Tsinghua University)H-Index: 4
view all 6 authors...
The unexpected finding of the quasi-steady state cool flame onboard the International Space Station motivated increasing interests to study the dynamic behaviors of cool flames. One key scientific question is how to form and stabilize a self-sustaining steady-state cool flame in a burner with well-defined boundary conditions. This paper numerically studied the stabilization of a self-sustaining steady-state premixed dimethyl ether/O2/N2 cool flame. The dual S-curve response in the perfectly-stir...
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#1Weiliang Wang (THU: Tsinghua University)H-Index: 6
#2Junfu Lyu (THU: Tsinghua University)H-Index: 4
Last.Weidou Ni (THU: Tsinghua University)H-Index: 22
view all 6 authors...
The natural draft dry cooling tower (NDDCT) has been increasingly used for cooling in power generation in arid area. As crosswind affects the performance of a NDDCT in a complicated way, and the basic affecting mechanism is unclear, attempts have been made to improve the performance of a NDDCT based on limited experiences. This paper introduces a decoupled method to study the complicated crosswind effects on the inlet and outlet of a NDDCT separately by computational fluid dynamics (CFD) modelin...
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