采用结构化程序设计方法，建立了锅炉热力计算与火用分析通用软件.本应用软件可对锅炉及各受热面进行热力计算、热平衡计算及火用损失分析;可对锅炉变工况、变煤种情况进行分析计算;还可进行各受热面合理布置与改造的设计计算.目的是了解和减少锅炉的热损失及火用损失，寻求最佳运行工况，提高能量利用率.通过对典型煤粉炉的多工况计算考核，表明软件具有较强的实用性和可靠性.

A numerical investigation on steady external axisymmetric viscous flow and heat and mass transfer at the surface of an inviscid spherical gas bubble has been carried out. The numerical code developed for this study employs a velocity-pressure formulation combined with a finite-volume discretisation of the Navier-Stokes species continuity and energy equations written in a non-orthogonal body-fitted coordinates (BFCs). The code is validated against two types of standard flows, namely the flow through a diverging Roache channel, and the flow, and heat and mass transfers around a rigid sphere for the Reynolds number range from 1 to 300. On the same basis, the external flow, heat and mass transfer at the surface of an inviscid spherical bubble is simulated numerically and compared with the results for a similar rigid sphere. There are distinguishable differences in both the flow fields and concentration (or temperature) distributions around the bubble and the sphere.

Aumerical modelling of steady axisymmetric viscous external flow and heat and mass transfer at the surface of an inviscid gas bubble has been carried out. A numerical method based on a velocity–pressure formulation combined with a. nite-volume discretization of the Navier–Stokes related equations written in a non-orthogonal body-. tted coordinate (BFC) is employed. The method has been validated by calculating the uid ow with heat and mass transfer around the surface of a rigid sphere and comparing with published data that are well regarded as benchmark solutions. The feasibility of the method for simulating a gas bubble problem is tested by calculating. elds around an inviscid fluid sphere (or a pseudo-bubble) at similar conditions to the rigid sphere. On this basis, a deformable gas bubble at Sc 500 and Pr 2 is studied. The. elds of flow, temperature, and concentration change with Reynolds and Weber numbers are simulated. It is found that the interactions between the. elds and the deformation of the bubble interface are signi. cant.

In this paper, the interfacial transport characteristics to or from spheroidal bubbles are studied numerically and the results of numerical simulations are reported. The numerical modelling uses the SIMPLE method with a non-orthogonal, boundary fitted staggered grid. The aim of this paper is to provide an understanding of the interfacial transport characteristics of inviscid spheroidal bubbles, of different geometric parameters, rising in a stagnant hot or bi-solution liquid. The flow and concentration (or temperature) fields around bubbles and similarly sized rigid spheroids are computed. Detailed analyses of the pressure and vorticity distributions at surfaces of the inviscid spheroidal bubbles are made and compared with those of similar rigid spheroids. Drag coefficients for and wake lengths behind rigid spheroids and inviscid spheroidal bubbles are also presented. Local and mean Sherwood numbers and Nusselt numbers at bubble and rigid spheroid surfaces are compared, as well as their change with the Reynolds and Schmidt numbers and geometric parameters.

This paper is concerned with a numerical study on evolution of a deformed bubble and propagation of the fields around the bubble. The model uses a numerical procedure with the direct-predictor method and the alternating dependent variables (ADV) skill developed by Li and Yan. The aim of this paper is to study the characteristics of interfacial transport for a deformed inviscid bubble rising in a quiescent hot or bi-solution liquid. The effects of the bubble deformation on temperature and concentration fields are calculated and simulated. The results demonstrate that the current numerical procedure is effective for solving such unsteady deformation problems of bubble accompanied with heat and mass transfer.

通过理论分析和数值模拟，比较了界面跟踪技术中VOF方法的三种界面重构技术。利用三种流场，即平移场、旋转场和剪切场对它们进行了数值模拟和比较。结果表明，除有些尖角会被少许抹平外，PLIC方法无论在界面的精细度上还是在锐利性上都要好于前两者，而FLAIR方法次之。

本文从追求整个肋壁最大传热量出发，证明了肋片传热面最佳肋片厚度的存在，并得到了确定最佳肋片厚度的理论关系式。

提出预测气泡在静止的液体中上升时，形状演变对周围液体的温度和浓度场的影响的数值方法。在这个方法中，在每个时间步长内，使用直接预测（direct2predictor）和交替求解变量（ADV）两方法进行内部迭代。利用所发展的方法和程序，模拟无粘性的气泡在静止的粘性不可压缩牛顿流体中上升时的形状演变过程以及对浓度和温度场的影响。给出不同物理条件下，气泡演变的途径和终态稳定的气泡形状。结果表明气泡形状的演变对周围流体温度和浓度场均有直接影响。

根据水平管外蒸气轴向流动速度随轴向距离的增加而逐渐减小的流动特性，建立了边界层外蒸气轴向流动速度方程，通过对数学模型的数值求解，得到了无量纲液膜厚度及凝结换热系数的数值解，同时得出了蒸气轴向流动速度随轴向坐标z的变化关系.并通过实验进行了验证，理论计算结果与实验结果吻合得较好.通过数据整理得到了实验关联式.

对具有多热源的热水、蒸汽供热管网的各热源之间最佳供热匹配提出了最优化运拾问题模型。针对运精问题的约束方程系数矩阵的特点，采用比单纯形法更有效的表上作业算法求解，并对该算法中的初始方案的确定，最优性检脸，非最优方案的调整及供求不平衡问题的解法进行研究。实例表明该方法是有效的。