This paper mainly introduces all sorts of means to control total pressure in air cushioned headbox.
随着造纸机车速的提高 ,传统的敞开式流浆箱很难满足生产需要 ,当车速超过 30 0m/min以后通常采用气垫式流浆箱 ,本文对气垫式流浆箱总压的各种控制方法做了较系统的介绍和比较分析。
In order to study the processing mechanism of BCF, the distribution of total pressure and statical pressure inside and outside the texturing tube are discussed with the help of the pressure probe, and the result of the experiments is analyzed.
为了探求BCF变形加工机理,利用测压探针测试了导丝管内部及出口端外的总压和静压分布规律,实验结果表明导丝管内为气流分布不均匀、速度梯度大、不对称的紊流流场。
Results show that:isolator has little effect on total temperature of the inlet exit;when the length of isolator is shorter,the total pressure of the inlet exit is.
同时,有无隔离段以及隔离段长度对进气道出口参数的影响,文中进行了初步的分析,结果表明:有无隔离段以及隔离段长度对进气道出口总温没有太大的影响;隔离段较短时,进气道出口总压比无隔离段小,但当隔离段长度增大到一定值后,进气道出口总压比无隔离段大;隔离段较短时,进气道出口马赫数比无隔离段大,但当隔离段长度增大到一定值后,进气道出口马赫数比无隔离段小。
The method can reduce the total compression rate of the finished products and raise intensity and tenacity of it.
采用加大半成品的总压缩率的方法,可以提高半成品热处理后的强度,从而可以减小成品拉拔的总压缩率,这样,有利于保证成品的强度和韧性。
The proper cumulative compression ratio can insure the pipe property.
在立式狄舍尔穿轧机上， 选择不同的工艺参数进行试验， 得出用连铸圆坯生产高质量钢管时， 应严格控制工艺参数， 尤其是优化穿孔前期的速度变化参数可防止管前端内析， 适宜的总压缩比（Ｂ 级管≮５－２ ， 石油套管≮１０－２） 可保证钢管的性能， 压缩比不足时， 可通过后续热处理改善钢管性能。
Based on the calculation model of various pressure losses in a positive pneumatic conveying system, a calculation model of total pressure loss in two- phase flow is established in the paper.
本文以气力压运系统各项压损计算模型为基础,提出了两相流总压损的计算模型,通过计算机对总压损计算模型进行了八次工况的计算。
Cavity length depth ratio strongly influences flow field、total pressure recovery、drag coefficient.
凹腔长深比对流场特性、总压恢复、燃烧室阻力影响显著。
The static pressure distributions along the duct, distortions of the flow field at the outlet section and total pressure recovery coefficients are measured and analyzed.
针对可利用部分冲压、带前输出轴直升机进气道结构特点 ,实验研究了在侧滑角从 0～ 1 35°状态下的直升机进气道流场特性 ,分析了沿程静压分布、进气道出口截面流场畸变指数、总压恢复系数等进气道性能参数。
The static pressure distributions along the duct,distortions of the flow field at the inlet exit section and total pressure recovery coefficients had been measured and analyzed.
本文针对带有前输出轴直升机进气道结构特点 ,以实验的方法 ,在直升机飞行包线范围内 ,着重研究在侧滑角从 0°到 1 3 5°状态下的直升机进气道流场特性 ,测量分析了沿程静压分布、进气道出口截面流场畸变指数、总压恢复系数等进气道性能参数。
The influence of width-to-pitch ratio (t/p) and width-to-height ratio (t/e) of ribs upon heat transfer and total pressure loss of rectangular grid-ribbed channel was studied experimentally.
通过10个实验模型研究了肋宽与肋间距之比t/p以及肋宽与肋高之比t/e对网格式肋化通道的换热与总压损失的影响。
The study involves the distribution of total pressure loss factor, outlet gas flow static pressure and Mach number along the blade height.
应用数值计算的方法 ,比较研究了某型导叶叶片不同周向弯曲对叶栅流动性能的影响 ,结果包括总压损失系数、出口气流静压、马赫数沿叶高分布。
An experimental investigation has been carried out to reveal the variations of total pressure loss and static pressure recovery with the inner and outer dump angles and the distance between prediffuser exit and the head of the flame tube (i.
本研究通过实验的手段在前置扩压器的结构和进口马赫数不变的条件下 ,改变内、外环突扩角和相对突扩间隙 ,研究总压损失和静压恢复的变化规律。
Study of staged propagation of circumferential steady total pressure distortion in axial flow compressors;
周向稳态总压畸变在多级轴流压气机中传递的逐级模拟研究
Analysis of flow loss induced by inlet total pressure distortion in a small fan;
某小型风扇内进口总压畸变引起流动损失分析
A stage-by-stage simulation method is introduced for analysis of inlet total pressure distortion effect on the multistage axial flow compressor characteristics.
介绍了1种分析进口总压畸变对多级轴流压气机特性影响的逐级模拟方法。
This paper based on the method of computational fluid dynamics,simulated the wind field,analyzed the total pressure differences between windward face and leeward face,and compared these with those of the non-bottom overhead construction of the same width and height.
结论非架空的多层建筑的迎背风面总压差随着高度增加而增加;而底层架空的多层建筑的迎背风面总压差随着高度增加而降低。