|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Pre-chamber turbulent jet ignition of methane/air mixtures with multiple orifices in a large bore constant volume chamber: effect of air-fuel equivalence ratio and pre-mixed pressure显示文摘Liquefied natural gas (LNG), mainly composed of methane, is in progress to substitute diesel fuel in heavyduty marine engine for practical, economic, and environmental considerations. However, natural gas is relatively difficult to be ignited in a large bore combustion chamber. A combustion enhancement technique called prechamber turbulent jet ignition (TJI) can permit combustion and flame propagation in a largebore volume. To investigate the effect of air-fuel equivalence ratio and pre-mixed pressure on pre-chamber TJI of methane/air mixtures with multiple orifices in a large bore volume, experimental tests and computational simulations were implemented to study the discharge of hot turbulent jets from six orifices of the pre-chamber. Different initial pressures and air-fuel equivalence ratios were considered to analyze the characteristics of TJI. The asymmetry of the turbulent jet actuated from six different orifices were found due to the asymmetric orientation of the spark plug, resulting in the inhomogeneous distribution of combustion in the constant volume chamber, which should be considered seriously in the marine engine design. Besides,as the premixed pressure increases, it has more effect on the flame propagation and plays a more important role, as it further increases. | Xiang LI Wenzheng ZHANG Zhong HUANG Dehao JU Li HUANG Mingzhi FENG Xingcai LU Zhen HUANG | 2019 | Frontiers in Energy2019，13，3： | 3 |
| 2 | Exergy losses in premixed flames of dimethyl ether and hydrogen blends显示文摘A second-law thermodynamic analysis was conducted for stoichiometric premixed dimethyl ether(DME)/hydrogen(H2)/air flames at atmospheric pressure.The exergy losses from the irreversibility sources,i.e.,chemical reaction,heat conduction and species diffusion,and those from partial combustion products were analyzed in the flames with changed fuel blends.It is observed that,regardless of the fuel blends,chemical reaction contributes most to the exergy losses,followed by incomplete combustion,and heat conduction,while mass diffusion has the least contribution to exergy loss.The results also indicate that increased H2 substitution decreases the exergy losses from reactions,conduction,and diffusion,primarily because of the flame thickness reduction at elevated H2 substitution.The decreases in exergy losses by chemical reactions and heat conduction are higher,but the exergy loss reduction by diffusion is slight.However,the exergy losses from incomplete combustion increase with H2 substitution,because the fractions of the unbumed fuels and combustion intermediates,e.g.,H2 and OH radical,increase.The overall exergy losses in the DME/H2 flames decrease by about 5%with increased H2 substitution from 0%to 100%. | Tongbin ZHAO Jiabo ZHANG Dehao JU Zhen HUANG Dong HAN | 2019 | Frontiers in Energy2019，13，4： | 1 |
| 3 | Pluripotent stem cell-derived CD 19-CAR iT cells effectively eradicate B-cell lymphoma in vivo显示文摘Chimeric antigen receptor T cell(CAR-T)therapy is one of the most promising approaches in cancer treatment.1 However,the limited availability of patient-derived T cells narrows its universal applicability.Thus,it is necessary to invent new methods to obtain alternative T-cell sources.Pluripotent stem cells(PSCs),which have unlimited culture potential and are amenable to gene editing,are ideal for generating induced T(iT)cells. | Cui Lv Shoubing Chen Fangxiao Hu Dehao Huang Tongjie Wang Juan Du Jinyong Wang Hongling Wu | 2021 | Cellular & Molecular Immunology2021，18，3： | 0 |
| 4 | THE ELLIPSOID ARTIFICIAL BOUNDARY METHOD FOR THREE-DIMENSIONAL UNBOUNDED DOMAINS显示文摘The artificial boundary method is applied to solve three-dimensional exterior problems.Two kind of rotating ellipsoids are chosen as the artificial boundaries and the exact arti-ficial boundary conditions are derived explicitly in terms of an infinite series.Then thewell-posedness of the coupled variational problem is obtained.It is found that error esti-mates derived depend on the mesh size,truncation term and the location of the artificialboundary.Three numerical examples are presented to demonstrate the effectiveness andaccuracy of the proposed method. | Hongying Huang Dehao Yu | 2009 | Journal of Computational Mathematics2009，27，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员