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Yang Zhang
Tsinghua University
61Publications
13H-index
434Citations
Publications 61
Newest
#1Hang Shi (THU: Tsinghua University)
#2Yuxin Wu (THU: Tsinghua University)H-Index: 14
Last.Junfu Lyu (THU: Tsinghua University)H-Index: 4
view all 5 authors...
Abstract The huge reserve of Zhundong (ZD) coal makes it important for energy utilization of China. However, big concerns on fouling and slagging in pulverized coal-firing boilers were risen due to its high alkali content. It’s important to investigate deposition in different heating surfaces of a boiler burning ZD coal. In this paper, XRF, XRD, ICP-OES were conducted to analyze the properties of ash deposits collected from different heating surfaces in a 350 MW boiler burning 30% Wudong (WD) an...
#1Lele Feng (Ministry of Education)H-Index: 1
#2Yuxin Wu (Ministry of Education)H-Index: 4
Last.Yang Zhang (Ministry of Education)H-Index: 13
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Abstract Soot cloud size is important in radiative heat transfer and particulate matter emission since it determines the integral effect in the sooty region; meanwhile, study on soot cloud size during single coal particle combustion is essential to develop theories of soot-relevant reaction pathways and mass transport. In this work, a 1-D transient coal combustion model with an empirical soot model was adopted and validated to study the effect of gas physicochemical properties and forced convect...
#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...
#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...
#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 ...
#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...
#1Yibin Fang ('SMMU': Second Military Medical University)H-Index: 11
#2Deyuan Zhu ('SMMU': Second Military Medical University)H-Index: 4
Last.Jianmin Liu ('SMMU': Second Military Medical University)H-Index: 18
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Objective To clarify safety and efficacy of stent-assisted coiling for treatment of blood blister–like aneurysm (BBA) in a multicenter experience. Methods A total of 212 consecutive cases (213 BBAs) treated with stent-assisted coiling were retrospectively reviewed and included in the final analysis. Outcomes including complete occlusion, recurrence, perioperative morbidity and mortality, and overall good neurologic outcome during follow-up were analyzed. Results Of 212 patients, 102 (48.1%) were...
#1Xiehe Yang (THU: Tsinghua University)
#2Wenfeng Shen (THU: Tsinghua University)H-Index: 3
Last.Jiansheng Zhang (THU: Tsinghua University)
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ABSTRACTExperimental measurements of the laminar flame speed and extinction strain rate of premixed methanol/air flames were conducted using the counterflow configuration. The validities of five methanol oxidation chemical kinetic models were verified. The results showed that a notable discrepancy was observed between the experimental and predicted extinction strain rate. Sensitivity analyses showed that the dominating reactions were H2/O2 chain branching/propagation reactions, CO/HCO reactions ...
#1Yuge Yao (THU: Tsinghua University)
#2Runxia Cai (THU: Tsinghua University)H-Index: 4
Last.Junfu Lyu (THU: Tsinghua University)H-Index: 4
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Abstract It is very important to accurately measure the tube-wall temperature of the high-temperature heating surface in the boilers with high steam parameters such as supercritical circulating fluidized bed (CFB) boilers. However, the severe abrasion problem caused by high solid concentration in CFB boilers hinders a direct tube-wall temperature measurement in CFB boilers. In this paper, a new method which embeds thermocouples in deposited metal on the heating surface was proposed to solve this...
Last.Hairui YangH-Index: 19
view all 5 authors...
The effect of rotation of the stagnation surface on the nanoparticle deposition in the flame stabilizing on a rotating surface (FSRS) configuration was numerically assessed using CFD method. The deposition properties including particle trajectories, deposition time, temperature and surrounding O2 concentration between the flame and stagnation surface were examined. The results revealed that although flame position is insensitive to the surface rotation, the temperature and velocity fields are re...
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