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1、KIVA3V 说明文档之 1 ITAPE5文件各参数说明 *deck epilog c c epilogue - c = c c a description of the quantities on the input data file “itape5“ c in the order in which they appear: c c = c ci name problem identification line, up to 80 characters 课题名称,最多80个字符 ci irest restart flag, where 0 = no restart, 0 = dump nu
2、mber to c restart from. read in in subr. begin, used in main driver c (kiva), and in newcyc, which then resets it to zero. 重新开始标志,当其值为0时,不重新开始,0时重新开始.作为求解器 需要中断时继续计算,在运行KIVA3V的时候重置为0.这是为了避免重复计算， 如可在压缩过程之后输出避免再计算压缩过程 ci nohydro normally = 0. set to 1 to turn off all hydro. this is c intended for quic
3、k runs that have only piston and valve c motion, grid rezoning, and checks for cells for having c negative volumes or concavity. it is a useful check to c ensure that the entire grid and moving surfaces will c behave in an expected fashion, before investing a great c amount of time in a full hydro r
4、un. 通常设为0.设为1时则关闭所有的Hydro,这是为了特意加快在只有一个 活塞和气阀运动时的运算速度,它会重新分区网格并检查是否有负的或 凹单元.这对于确定整个网格和运动表面按照预定规则计算是很有用的, 它会在所有hydro运行之前花费大量的时间. ci lwall +1=law-of-the-wall bdry. layer; 0=freeslip; -1=noslip +1表示为壁函数;0=自由滑移壁面(气相速度=壁面速度);-1=非滑移壁面 (气相法向速度=壁面法向速度).详见KIVA2说明书. ci lpr long print control: 1=write on fiche
5、, 0=omit entirely 输出控制:1=输出到胶片;0=完全忽略.通常为0，为1时多用来代码调试用 ci irez rezone flag: 0 = pure Eulerian, 1 = pure Lagrangian, c 2 = traditional Kiva engine rezone. 3 is the same as 2 c except the squish region is never accordioned, thus c preserving the original axial grid spacing. irez = 4 is c used for rezo
6、ning of grids with canted valves, where: c irez = 4 is for quasi-symmetric pentroof cylinders, c irez = 5 is for 2-valve OHV wedge geometries, and c irez = 6 is for geometries that have both pentroof and c wedge features. note that the special rezone coding for c none of these three cases can be con
7、sidered fully general. 再分区标志:0=完全欧拉法（网格节点不动，所以网格形状不变，适用于稳态流）,1=完全 拉各朗日法（表示网格节点以流体速度移动）,2=传统KIVA法（允许网格改变形状做为活塞 移动计算， 以活塞速度.3=除了压缩区域不可折叠外与2一样,因而保留了原有的轴向网格间 距.当其值=4时用来重分区斜向气阀的情况.=4用于准平衡的封闭汽缸.=5用于2气阀的OHV 锲型几何体.=6用于同时有封闭汽缸与楔形体的几何体.注意,如果不是满足以上3种情况的 特殊分区法按一般方法处理.一般选2。 ci ncfilm cycle interval between film
8、outputs 图形输出的循环时间间隔，如100个循环。通常为9999表示以其他参数控制输出，如cafilm KIVA3V 说明文档之 2 ci nctap8 cycle interval between restart dumps on file otape8 从重新开始信息转储至otape8的时间间隔 ci nclast cycle number when calculation is terminated 计算终止时的循环数.当其值很大时，把其功能转移到其他参数控制，如cafin,twfin。 参考值：60000 ci ncmon cycle interval between summa
9、ry prints of engine cylinder c data on special output files. set ncmon 5000 to turn c off this option entirely 特殊输出文件中的汽缸数据进行摘要输出的时间间隔.设为5000时 将会完全关闭这个选项 ci ncaspec 0 is the number of crank angles listed free-format in c the following line(s), for which film output is to be made. c this is useful wh
10、en one wants output only at a number of c specific crank angles. set ncaspec = 0 to turn it off. c (note: as dimensioned, ncaspec must be 0表示的值为进行图形输出的曲轴转角的个数, 这方便我们在特殊角度取出数据.设为0时关闭.(注意:维数限定其值必须 atdc ci angmom =1.0 for angular momentum conservation in momflx (cyl=1.0) =1.0时表示在momflx里角动量守恒(cyl=1.0表示圆
11、柱；0.0表示平面)， angmom=angmom*cyl,见KIVA2，P152。 ci pgssw =1.0 to employ pressure gradient scaling, =0.0 to disable c note: setup turns pgs off if pressure boundaries present =1.0为了使用压力缩放比例梯度,=0.0则取消.（在内燃机燃烧中） 注意:在压力边界线出现时把pgs关闭。典型值0.0 ci dti initial time step dt supplied in input data file dt提供给输入数据文件的初始
12、时间步长。若太大则计算开始时就失败；例如在不复杂的计 算中（如压缩过程）则大些1.0e-5；在复杂计算中就选小些约为5.0e-7。此参数与引擎速 度和网格大小有关。范围：1.0e-75.0e-5。一般用于调试，为本人经验确定。 ci dtmxca maximum number of crank angle degrees per time step; use a c large value if you dont want it as an upper limit on dt 每时间步长的曲轴转角最大值;如果你不想超出dt极限就选个最大值.如果在KIVA计算失败 后，可调整此参数（更小些）可使
13、计算恢复，在恢复后调大些。如果网格够好，发动机转 速够快时可小些；如果太大则表示用其他参数代替它。范围：0.25-1.0，典型值：0.5 ci dtmax maximum dt allowed during entire calculation 在整个循环中所允许的最大dt值，与前者相同意义，可相互代替（取大值）。范围： 1.0e-70.5e-5,典型值：5.0e-6 ci tlimd =1.0 forces a restart-dump exit before job time limit, KIVA3V 说明文档之 3 c =0.0 for no restart dump =1.0将在工作
14、时间限度前使重新计算转储库强制退出.表示计算原过程。此值为典型值 =0.0则没有此转储库 ci twfilm problem time interval between film outputs 图形输出的课题时间间隔，典型值：9.99e+9 ci twfin problem time when calculation is terminated 计算终止的课题时间，同上 ci fchsp time step factor for kinetic reactions and spray c evaporation: if tchem (q.v.) fchsp, dt is reduced by c the factor fchsp/tchem; similarly, if tevap (q.v.) c fchsp, dt is reduced by the factor fchsp/tevap 动力反应
