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heat body
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Regarding the temperature of cocoon drying, heat supplying temperture was generally used in the past owing to the inadequacy of the thermoscope4: And the temperature of the heated body was usually deficient. In this experiment, we measured the cocoon layers, pupa shells and hearts of the heated bodies in the processes of drying with modern transistor thermoscopes Through several measurements of the inside heat supplying in 1964-1965, 1975, we have got a few data. In general, a formula...

Regarding the temperature of cocoon drying, heat supplying temperture was generally used in the past owing to the inadequacy of the thermoscope4: And the temperature of the heated body was usually deficient. In this experiment, we measured the cocoon layers, pupa shells and hearts of the heated bodies in the processes of drying with modern transistor thermoscopes Through several measurements of the inside heat supplying in 1964-1965, 1975, we have got a few data. In general, a formula may be formed as: wall temperature >room temperature >pupa temperature > layer temperature. In the past the highest temperature of drying was controlled below 100? but now it may be raised on to 120癟his experiment, in practice indicates the rational ity of the raising of temperature. In add'tion, with the gradual development of the drying degrees, the temperature of the cocoon layer and the pupa body rises. The temperature risiing in the cocoon layer is higner than that in the pupa body. Attention musto be paid to the grasp of the temperature in the later stage, especially to the final temperature.

对于烘茧温度,过去由于测温仪器的局限性,一般用的都是给热温度。至于受热体的温室,基本缺如。本试验应用现代的半导体测温仪器,对受热体蚕茧的茧层和蛹皮、蛹心,行烘茧进程中的温度实测。经1964、1965和1975年的几次测定,于内部予热式烘茧,初步摸索了一些数据,大体为壁温>室温>蛹温>层温的概念。过去烘茧最高温度规定100℃,现在又提可达120℃,这次试测,就从实践上说明了提高温度的合理性。又在烘茧中,随着干燥程度的逐步发展,茧层温度和蛹体温度就比例上升,茧层温度的上升比又大于蛹体,这是掌握后阶段温度特别是最后温度时特别应该注意的。

Based on experimental study of heating a silver ball probe and a set of steel cylinders in agas fluidized bed furnace of hollow-corundum-sphere-particles, this paper deals with effects ofoperating parameters, particle properties, heated bodies' dimensions, and especially the body'sown temperature on the heat transfer coefficient h. And laws of the fluctuations and a formulafor the calculation of h have been found. These would be useful for the design, predication andautomatic control...

Based on experimental study of heating a silver ball probe and a set of steel cylinders in agas fluidized bed furnace of hollow-corundum-sphere-particles, this paper deals with effects ofoperating parameters, particle properties, heated bodies' dimensions, and especially the body'sown temperature on the heat transfer coefficient h. And laws of the fluctuations and a formulafor the calculation of h have been found. These would be useful for the design, predication andautomatic control of such furnaces.

本工作通过对银球和一组45号钢工件在空心刚玉球燃气流动粒子炉内的加热实验研究,分析了各操作参数、粒子特性、工件尺寸、特别是工件自身温度对传热系数h的影响规律,给出了h的计算公式,为燃气流动粒子炉的设计、预测和自动控制提供了参考依据。

With the aid of the LDV-02 laser velocimeter, we measured the mean velocity, turbulence level and radius of the wake flow behind a slender streamlined body of revolution under heating or non-heating conditions, the body supported in a recirculating water channel. The measurements were made at the body-diameter Reynolds number 2400 in the region extending from four-body diameters to sixteenbody diameters downstream. The semi-empirical theory of Hama and Peterson(Ref. [1]),...

With the aid of the LDV-02 laser velocimeter, we measured the mean velocity, turbulence level and radius of the wake flow behind a slender streamlined body of revolution under heating or non-heating conditions, the body supported in a recirculating water channel. The measurements were made at the body-diameter Reynolds number 2400 in the region extending from four-body diameters to sixteenbody diameters downstream. The semi-empirical theory of Hama and Peterson(Ref. [1]), which was developed for the calculation of a simitar wake behind the non-heated body, is modified to handle the present cases with heat transfer effects between the heated body and its wake flow. Therefore, modification to the semi-empirical analysis in Ref. [1] is made to describe how temperature field of the wake influences its velocity field. Information concerning the influence of heating on drag coefficient of the body is inferred from the wake centerline velocity.

本文利用LDV—02型激光测速仪,在循环水槽里测量了加热和非加热流线型细长旋成体尾流的速度分布和湍流度,并把Hama&Peterson的半经验理论(它适用于非加热体的类似尾流)修正为本文的半经验分析,较好地描述了尾流温度场对其速度场的影响,还从测得的尾流速度数据推断出加热对水下运动物体阻力系数的影响。

 
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