Transactions of the Japan Society of Mechanical Engineers. B最新文献_第4页

Measurements of isobaric heat capacity of liquid ethanol by using flow calorimetry 用流动量热法测定液体乙醇的等压热容

Transactions of the Japan Society of Mechanical Engineers. B Pub Date : 2012-06-15 DOI: 10.1299/KIKAIB.78.998

S. Kondo, T. Miyazawa, Haruki Sato

{"title":"Measurements of isobaric heat capacity of liquid ethanol by using flow calorimetry","authors":"S. Kondo, T. Miyazawa, Haruki Sato","doi":"10.1299/KIKAIB.78.998","DOIUrl":"https://doi.org/10.1299/KIKAIB.78.998","url":null,"abstract":"The isobaric heat capacities of liquid ethanol are measured. Our group constructed a flow-calorimeter in 1996 for measuring specific heat-capacity at constant pressure of liquid refrigerants. The improvement of apparatus is continuously conducted. In 2008, Suzuki reconstructed the apparatus of a flow calorimetry and a stable mass flow rate became possible by introducing plastic accumulators. And isobaric heat capacities of ethanol are measured. The measurements were obtained at 8 points in the temperature range from 280 to 320 K and along a pressure of 500 kPa. The expanded uncertainty(coverage factor of k = 2) for heat capacity is estimated to be from 0.57 % to 0.91 % . We confirmed that the apparatus is able to measure without influence of heat loss and to get the repeatability within the uncertainty. For more careful consideration, we measured for two different samples of ethanol supplied from different manufacturers under the same conditions. Measured values for the different samples agree within the uncertainty each other. The measurements don’t perfectly agree with existing measurements reported by other researchers or derived specific-heat-capacity values from existing equation of state developed by Dillon and Penoncello within the uncertainty. Very careful assessment is requested for the isobaric heat capacity values of liquid ethanol.","PeriodicalId":331123,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126023724","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

Estimation method of spray diameter and size distribution based on energy conservation law 基于能量守恒定律的喷雾直径和粒径分布估计方法

Transactions of the Japan Society of Mechanical Engineers. B Pub Date : 2012-06-15 DOI: 10.1299/KIKAIB.78.850

C. Inoue, Toshinori Watanabe, T. Himeno, M. Koshi

{"title":"Estimation method of spray diameter and size distribution based on energy conservation law","authors":"C. Inoue, Toshinori Watanabe, T. Himeno, M. Koshi","doi":"10.1299/KIKAIB.78.850","DOIUrl":"https://doi.org/10.1299/KIKAIB.78.850","url":null,"abstract":"An analytical method was proposed and validated for droplet diameters and size distributions. The method was developed based on the energy conservation law including surface free energy and Laplace pressure. Under several hypotheses, the law derived an equation indicating that atomization resulted from a kinetic energy loss. Thus, once the amount of loss was obtained, the droplet diameter was able to be calculated without any experimental parameters. When the effects of ambient gas were ignorable, injection velocity profiles of liquid jets were the essential factor for the reduction of kinetic energy. The minimum Sauter mean diameter produced by liquid sheet atomization was inversely proportional to the injection Weber number under the conditions of injection velocity profiles with laminar or turbulent. By applying the mean diameter model, a non dimensional distribution function was also derived assuming Nukiyama-Tanasawa's function. The validity of these estimation methods were favorably confirmed by comparisons with corresponding mean diameters and the size distributions, which were experimentally measured under atmospheric pressure.","PeriodicalId":331123,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126115391","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

Observation of Surface Damage in a Valve for Hydrogen Gas and Leakage Conditions 氢气阀门表面损伤及泄漏情况的观察

Transactions of the Japan Society of Mechanical Engineers. B Pub Date : 2012-06-04 DOI: 10.1299/KIKAIA.78.674

M. Kubota, Y. Adachi, Y. Kondo, Y. Kondo

引用次数: 0

Analysis of GPI-AP diffusion on plasma membrane of endothelial cell using photochromic fluorescent protein 利用光致变色荧光蛋白分析GPI-AP在内皮细胞质膜上的扩散

Transactions of the Japan Society of Mechanical Engineers. B Pub Date : 2012-04-16 DOI: 10.1299/KIKAIB.78.194

Naoto Kawasaki, Tomoya Shimada, T. Fukui, K. Hamasaki, S. Kudo

引用次数: 0

Instability of a hollow-type streamwise vortex 空心型流向涡的不稳定性

Transactions of the Japan Society of Mechanical Engineers. B Pub Date : 2012-04-16 DOI: 10.1299/KIKAIB.78.531

H. Gotoda, Yu Hashtoa, T. Hiejima, Kazumichi Matsutani, M. Nishioka

{"title":"Instability of a hollow-type streamwise vortex","authors":"H. Gotoda, Yu Hashtoa, T. Hiejima, Kazumichi Matsutani, M. Nishioka","doi":"10.1299/KIKAIB.78.531","DOIUrl":"https://doi.org/10.1299/KIKAIB.78.531","url":null,"abstract":"We experimentally investigate the unstable behavior of a large scale hollow-type streamwise vortex which has a solid-rotation type distribution of vorticity existing only in an annular region initially, focusing on how the large scale vortex breaks down into small scales downstream. With increasing the intensity of the initial vorticity, the large scale hollow vortex undergoes significant transition from a steady-state to nonlinear stages governed by coherent vortices through the primary linear instability. When the periodic motions due to the primary instability grow and redistribute the vorticity, a rotating vorticity field of polygonal shape begins to develop. This is an important precursor to the nonlinear evolution of the instability of hollow-type streamwise vortex. The flow structures we obtained in this work allow the fluid mixing to be significantly enhanced even under low Reynolds numbers. The present study also shows that the ratio of maximum azimuthal velocity to mean axial velocity is important as a governing flow-similarity parameter. This finding is reasonable as the cited swirl velocity ratio is directly proportional to the ratio of vortex Reynolds number to axial flow Reynolds number.","PeriodicalId":331123,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127583243","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

HCCI engine fueled by woody biomass gas and city gas (effect of fuel composition) 木质生物质燃气和城市燃气为燃料的HCCI发动机(燃料成分的影响)

Transactions of the Japan Society of Mechanical Engineers. B Pub Date : 2012-04-16 DOI: 10.1299/KIKAIB.78.410

Y. Yamasaki, Haruto Shinoda, S. Kaneko

引用次数: 0

Interference Effect of Downstream Strip Plate on the Crossflow Vibration of a Square Cylinder 下游带板干涉对方圆柱横流振动的影响

Transactions of the Japan Society of Mechanical Engineers. B Pub Date : 2011-12-01 DOI: 10.1299/KIKAIB.77.647

Y. Kawabata, Tsutomu Takahashi, Takeshi Haginoya, M. Shirakashi

引用次数: 3

アルミニウム合金ダイカストの疲労強度に対する鋳巣の定量的影響評価（第2報，鋳巣まわり弾性応力場に基づく疲労強度予測）铸巢对铝合金压铸疲劳强度的定量影响评价(第2报告，基于铸巢周围弹性应力场的疲劳强度预测)

Transactions of the Japan Society of Mechanical Engineers. B Pub Date : 2011-12-01 DOI: 10.1299/KIKAIA.77.48

Osamu Kuwazuru, Yozo Murata, Takao Utsunomiya, Yoshihiko Hangai, T. Yano, S. Bidhar, Y. Shiihara, Soichiro Kitahara, Nobuhiro Yoshikawa

{"title":"アルミニウム合金ダイカストの疲労強度に対する鋳巣の定量的影響評価（第2報，鋳巣まわり弾性応力場に基づく疲労強度予測）","authors":"Osamu Kuwazuru, Yozo Murata, Takao Utsunomiya, Yoshihiko Hangai, T. Yano, S. Bidhar, Y. Shiihara, Soichiro Kitahara, Nobuhiro Yoshikawa","doi":"10.1299/KIKAIA.77.48","DOIUrl":"https://doi.org/10.1299/KIKAIA.77.48","url":null,"abstract":"An empirical prediction method for the fatigue strength considering the effect of porosity was proposed. We prepared six types of specimen of ADC12 high pressure die cast aluminum alloy, where the casting condition was different to each other, and obtained the S-N curve for each specimen type from the fatigue test. The porosity volume fraction for all specimens was calculated using the X-ray CT images. The image-based finite element analysis was also carried out for all specimens to evaluate the maximum first principal stress corresponding to the nominal stress amplitude in the fatigue test. The maximum stress was referred to as the local stress amplitude, and its ratio to the nominal stress amplitude was defined as the local stress concentration factor. We modified the S-N data by using the local stress amplitude instead of the nominal stress amplitude, and obtained a single master S-N curve. From the statistical investigation, the local stress concentration factor was found to be determined empirically by the porosity volume fraction. The relationship was identified by the least-square approximation. Consequently, we found that the fatigue strength was predicted from the porosity volume fraction via the local stress amplitude and the master S-N curve.","PeriodicalId":331123,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124147874","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

Numerical simulation of sand transfer in desert and its suppression 沙漠输沙数值模拟及其抑制

Transactions of the Japan Society of Mechanical Engineers. B Pub Date : 2011-12-01 DOI: 10.1299/KIKAIB.77.2246

Kazuto Matsui, Masaya Suzuki, M. Yamamoto

引用次数: 0

Intercellular Ca 2+ response triggered by IP 3 among endothelial cells in shear stress flow 内皮细胞在剪切应力流动中ip3触发细胞间ca2 +反应

Transactions of the Japan Society of Mechanical Engineers. B Pub Date : 2011-12-01 DOI: 10.1299/KIKAIB.77.2431

S. Kudo, M. Hosobuchi, Shogo Kuretoko, Tateki Sumii, Tomoya Shimada, Marie Terada, K. Tanishita

{"title":"Intercellular Ca 2+ response triggered by IP 3 among endothelial cells in shear stress flow","authors":"S. Kudo, M. Hosobuchi, Shogo Kuretoko, Tateki Sumii, Tomoya Shimada, Marie Terada, K. Tanishita","doi":"10.1299/KIKAIB.77.2431","DOIUrl":"https://doi.org/10.1299/KIKAIB.77.2431","url":null,"abstract":"A phenomenon has been observed in which intracellular Ca2+ concentration in endothelial cells increases upon application of shear stress (Ca2+ response). It is therefore assumed that Ca2+ is the second messenger in the transfer of shear stress stimulation into cells. The Ca2+ response is also known to spread to surrounding cells (Ca2+ wave). We investigated the effects on Ca2+ wave among cultured bovine aorta endothelial cells (BAECs) upon inhibiting the main intercellular signaling pathways, such as gap junction and paracrine pathways by inducing Ca2+ wave using D-myo-inositol 1,4,5-trisphosphate, P4(5)-(1-(2-nitrophenyl)ethyl) ester trisodium salt (Caged IP3) due to an intracellular IP3 elevation. In addition, we investigated the Ca2+ wave among BAECs under shear stress loading. Using Caged IP3, local release of ATP from BAEC induced Ca2+ wave. The Ca2+ wave was inhibited by the inhibitors of paracrine pathways. Furthermore, the Ca2+ response spread in the direction of the downstream under shear flow. These results suggest that paracrine pathway is dominant in both of flow and no flow conditions.","PeriodicalId":331123,"journal":{"name":"Transactions of the Japan Society of Mechanical Engineers. B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130271324","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