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JSME international journal : bulletin of the JSME最新文献

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Flow Characteristics of Condensate on a Vertical Column of Horizontal Low Finned Tubes 水平低翅片管垂直塔中凝结水的流动特性
JSME international journal : bulletin of the JSME Pub Date : 1987-12-16 DOI: 10.1299/KIKAIB.53.1320
H. Honda, S. Nozu, Yasuhito Takeda
{"title":"Flow Characteristics of Condensate on a Vertical Column of Horizontal Low Finned Tubes","authors":"H. Honda, S. Nozu, Yasuhito Takeda","doi":"10.1299/KIKAIB.53.1320","DOIUrl":"https://doi.org/10.1299/KIKAIB.53.1320","url":null,"abstract":"Experiments were performed to study the flow characteristics of condensate on a simulated bank of horizontal low finned tubes. Two or three tubes arranged in a vertical column were set in a stationary vapor. The top tube had a longitudinal slit at the upper end through which the test liquid was fed uniformly on the tube surface. Cooling water was passed through the lower tubes. The test fluids used were R-113, methanol and normal propanol. Four major flow modes: droplet, column, column-sheet and sheet, were observed as the liquid flow rate was increased. Experimental data on the number of instantaneous falling sites, the proportion of surface area covered with the falling liquid and the flooding angle below which the inter-fin sp. ace was flooded with condensate were obtained for a range of liquid flow rates. Theoretical considerations were given to the effect of liquid flow rate on the flow mode transition and on the measured quantities.","PeriodicalId":286527,"journal":{"name":"JSME international journal : bulletin of the JSME","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127683738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 30
Initiation of Fatigue Cracks in Ground High Carbon Steels 磨削高碳钢疲劳裂纹的萌生
JSME international journal : bulletin of the JSME Pub Date : 1987-12-16 DOI: 10.1299/KIKAIC.53.995
Seiki Watanabe, H. Furuichi, S. Nakamura
{"title":"Initiation of Fatigue Cracks in Ground High Carbon Steels","authors":"Seiki Watanabe, H. Furuichi, S. Nakamura","doi":"10.1299/KIKAIC.53.995","DOIUrl":"https://doi.org/10.1299/KIKAIC.53.995","url":null,"abstract":"The effect of grinding (including one pass grinding) on the initiation of fatigue cracks in high carbon steels (S 48 C and SK5) was studied, under different grinding conditions. The main results are summarized as follows. (1) When the grinding direction was parallel to the loading axis, the origin of the fatigue cracks was nonmetallic inclusions and abrasive grains imbedded into the steels, in every case. (2) When the grinding direction was at right angles to the loading axis, fatigue cracks were initiated in the region of grinding streaks, in every case. (3) For one pass grindings, when the grinding direction was at right angles to the loading axis, defects bred by the displacement of imbedded abrasive grains sometimes caused fatigue cracks. (4) For one pass grindings in the same direction, fatigue strength of wetly ground specimens was higher than that of dryly ground ones.","PeriodicalId":286527,"journal":{"name":"JSME international journal : bulletin of the JSME","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131455189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Flows of Non-Newtonian Fluids 非牛顿流体的流动
JSME international journal : bulletin of the JSME Pub Date : 1987-12-16 DOI: 10.1299/JSME1987.30.1877
Y. Tomita
{"title":"Flows of Non-Newtonian Fluids","authors":"Y. Tomita","doi":"10.1299/JSME1987.30.1877","DOIUrl":"https://doi.org/10.1299/JSME1987.30.1877","url":null,"abstract":"The present paper summarizes various problems on non-Newtonian fluid mechanics. Due to complex rheological behaviors of non-Newtonian fluids, constitutive equations have highly nonlinear character. As two approaches to obtain constitutive equations, continuum mechanics and molecular theory are described, and then a number of models are presented. Various flow problems are discussed. With regard to measuring methods, the hole pressure error and the first normal stress difference of dilute polymer solutions are stated. Moreover, steady flow in straight pipes, entrance flow through abrupt contractions, flow instabilities, Toms effect, and numerical method are briefly described.","PeriodicalId":286527,"journal":{"name":"JSME international journal : bulletin of the JSME","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130136020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Stress Analysis of Hourglass Worm Gear : 1st Report, Case of Classical Hindley Worm Gear 沙漏形蜗轮的应力分析:第一报告，以经典亨德利蜗轮为例
JSME international journal : bulletin of the JSME Pub Date : 1987-12-16 DOI: 10.1299/kikaia.53.827
Yutaka Kamiya, Susumu Takahashi, M. Maki, Satoshi Hosoe
{"title":"Stress Analysis of Hourglass Worm Gear : 1st Report, Case of Classical Hindley Worm Gear","authors":"Yutaka Kamiya, Susumu Takahashi, M. Maki, Satoshi Hosoe","doi":"10.1299/kikaia.53.827","DOIUrl":"https://doi.org/10.1299/kikaia.53.827","url":null,"abstract":"","PeriodicalId":286527,"journal":{"name":"JSME international journal : bulletin of the JSME","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115125719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Strain Function and Complex Stress Function in the Two Dimensional Theory of Elasticity 论二维弹性理论中的应变函数和复应力函数
JSME international journal : bulletin of the JSME Pub Date : 1987-12-16 DOI: 10.1299/KIKAIA.53.816
H. Hasegawa
{"title":"On the Strain Function and Complex Stress Function in the Two Dimensional Theory of Elasticity","authors":"H. Hasegawa","doi":"10.1299/KIKAIA.53.816","DOIUrl":"https://doi.org/10.1299/KIKAIA.53.816","url":null,"abstract":"","PeriodicalId":286527,"journal":{"name":"JSME international journal : bulletin of the JSME","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129754106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The Effect of the Surface Working Process on the Patigue Strength of Carburized Steels 表面加工工艺对渗碳钢疲劳强度的影响
JSME international journal : bulletin of the JSME Pub Date : 1987-12-16 DOI: 10.1299/KIKAIA.53.702
A. Komine, Tohru Yamaguchi, M. Kikuchi, Y. Kibayashi
{"title":"The Effect of the Surface Working Process on the Patigue Strength of Carburized Steels","authors":"A. Komine, Tohru Yamaguchi, M. Kikuchi, Y. Kibayashi","doi":"10.1299/KIKAIA.53.702","DOIUrl":"https://doi.org/10.1299/KIKAIA.53.702","url":null,"abstract":"The effect of surface working (shot peening) and additional post working heat treatment on the fatigue properties of carburized steel with surface structure anomalies was evaluated through rotating bending fatigue tests. Smooth specimens with various surface roughness and notched specimens were gas carburized and shot peened. Some smooth specimens were tempered after shot peening to examine the effect of post working heat treatment. Hardness, residual stress and the amount of retained austenite near the surface of the carburized and shot peened specimens were measured. The fatigue strength of all of the shot peened specimens increased and was as much as 90% higher than that of carburized specimens. The smooth specimen tempered at 100°C after shot peening gave the highest fatigue strength among all samples tested in this study.","PeriodicalId":286527,"journal":{"name":"JSME international journal : bulletin of the JSME","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134388582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Elastic Buckling and Flexural Vibration of Variable-Thickness Annular Plates Under Nonuniform In-Plane Forces 变厚环形板在非均匀面内力作用下的弹性屈曲和弯曲振动
JSME international journal : bulletin of the JSME Pub Date : 1987-12-16 DOI: 10.1299/JSME1987.30.1890
O. Majima, K. Hayashi
{"title":"Elastic Buckling and Flexural Vibration of Variable-Thickness Annular Plates Under Nonuniform In-Plane Forces","authors":"O. Majima, K. Hayashi","doi":"10.1299/JSME1987.30.1890","DOIUrl":"https://doi.org/10.1299/JSME1987.30.1890","url":null,"abstract":"This paper deals with elastic buckling and flexural vibration of annular plates whose thicknesses vary linearly in the radial direction. The annular plate is subjected to in-plane forces along its inner and outer edges, which vary in the circumferential direction. These problems are analyzed by the Galerkin method. Eigenfunctions of the natural vibration of a constant-thickness annular plate without in-plane forces are used as admissible functions. Two types of in-plane forces are adopted ; one a sinusoidally varying nonuniformity along the outer edge, and the other uniform along parts of the outer edge and zero on the remainder of the edge. The influences of the nonuniformity of the in-plane forces on the buckling load and natural frequencies are investigated. It is found that the increase of the nonuniformity decreases the buckling load and the fundamental natural frequency. This tendency becomes more evident when the thickness of the plate at the inner edge is thinner and the hole larger.","PeriodicalId":286527,"journal":{"name":"JSME international journal : bulletin of the JSME","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115133825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Micro-Characteristics of Turbulent Thermal Convection in a Horizontal Fluid Layer Heated Internally and from Below 内部和下方加热水平流体层湍流热对流的微观特征
JSME international journal : bulletin of the JSME Pub Date : 1987-12-16 DOI: 10.1299/KIKAIB.53.1291
Y. Kikuchi, Z. Kawara, Takashi Ebisu, I. Michiyoshi
{"title":"Micro-Characteristics of Turbulent Thermal Convection in a Horizontal Fluid Layer Heated Internally and from Below","authors":"Y. Kikuchi, Z. Kawara, Takashi Ebisu, I. Michiyoshi","doi":"10.1299/KIKAIB.53.1291","DOIUrl":"https://doi.org/10.1299/KIKAIB.53.1291","url":null,"abstract":"Measurements were taken of the fluid temperature fluctuations with turbulent thermal convection in a horizontal layer of water with uniform volumetric energy sources and a constant rate of bottom heating. The temperature fluctuations were fairly small in the central core region, which was nearly isothermal because of strong turbulent mixing. At the edge of the thermal boundary layer, however, violent temperature spikes were dominant, and were accompanied with the intermittent release of cold plumes from the upper boundary and hot plumes from the lower boundary. With an increase in the Rayleigh number, the number of plumes per unit area increased and the frequency of plume formation became higher. The measured surface heat flux agreed well with the calculation by a theoretical model, in which a renewal of the heat-generating boundary layer was assumed to occur periodically at the moment of plume release.","PeriodicalId":286527,"journal":{"name":"JSME international journal : bulletin of the JSME","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124442886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Measurements of Fuel Vapor Concentration in a Diesel Spray by Image Analysis of a Reconstructed Hologram 用重建全息图像分析测量柴油喷雾中燃油蒸气浓度
JSME international journal : bulletin of the JSME Pub Date : 1987-12-16 DOI: 10.1299/KIKAIB.53.1487
K. Nishida, Naoki Murakami, H. Hiroyasu
{"title":"Measurements of Fuel Vapor Concentration in a Diesel Spray by Image Analysis of a Reconstructed Hologram","authors":"K. Nishida, Naoki Murakami, H. Hiroyasu","doi":"10.1299/KIKAIB.53.1487","DOIUrl":"https://doi.org/10.1299/KIKAIB.53.1487","url":null,"abstract":"A diesel spray in a high-pressure and high-temperature atmosphere was recorded by pulsed-laser holography. The schlieren and shadow images of the same spray obtained from a reconstructed hologram were analyzed, and the concentrations of fuel vapor and droplets in the spray were measured. The radial distribution of the fuel vapor concentration shows a low value at the center and the edge of the spray, and takes a maximum between them. At the section where a relatively large eddy is produced around the spray, the fuel vapor concentration increases in the whole section, and takes two maximums corresponding to the structure of the eddy flow. The axial distribution of the fuel vapor concentration shows a gradual increase in the upper stream of the spray, whereas in the lower part of the spray it shows sudden increase and decrease repeatedly due to the eddies around the spray. The axial distribution of the total fuel (vapor and droplets) approximately agrees with the calculated result by the momentum theory in the lower part of the spray.","PeriodicalId":286527,"journal":{"name":"JSME international journal : bulletin of the JSME","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129530243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical Analysis of the Reaction Process in a Plane Shear Layer 平面剪切层内反应过程的数值分析
JSME international journal : bulletin of the JSME Pub Date : 1987-12-16 DOI: 10.1299/KIKAIB.53.1403
T. Hasegawa, S. Yamaguchi, N. Ohiwa
{"title":"Numerical Analysis of the Reaction Process in a Plane Shear Layer","authors":"T. Hasegawa, S. Yamaguchi, N. Ohiwa","doi":"10.1299/KIKAIB.53.1403","DOIUrl":"https://doi.org/10.1299/KIKAIB.53.1403","url":null,"abstract":"The unsteady reaction process in an incompressible plane shear layer was numerically simulated by using the discrete vortex method combined with the third-order upwind finite difference method. The average product concentration increased and the thickness of the reaction zone decreased as the Damkohler number increased. The distribution profiles of the average concentrations and the fluctuation intensities showed similarities. The two-dimensional large eddy motion produced the stepwise shape of the average concentrations and the two-peak profiles of the fluctuation intensities. The asymmetrical entrainment of the highspeed fluid in a plane shear layer resulted in variations in the reaction rate and in the product thickness, as the stoichiometric ratio was changed.","PeriodicalId":286527,"journal":{"name":"JSME international journal : bulletin of the JSME","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131364341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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