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1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids最新文献

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Streaming current as estimated by the dissociation constant 由解离常数估计的流动电流
1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids Pub Date : 1987-07-27 DOI: 10.1109/14.7332
S. Watanabe, A. Ohashi, M. Fujii, K. Tanabe, M. Benyamina, G. Touchard
{"title":"Streaming current as estimated by the dissociation constant","authors":"S. Watanabe, A. Ohashi, M. Fujii, K. Tanabe, M. Benyamina, G. Touchard","doi":"10.1109/14.7332","DOIUrl":"https://doi.org/10.1109/14.7332","url":null,"abstract":"It is of great concern to find out the factors determining charging densities. The authors have been engaged in experiments as to the relation between the application of additives and the charging density. It was found that the peak values for C.M.C. and charging density coincided. I n add i t i on, before C. M. C. was reached, charging density increased in proportion to the quantity of additive used. Since the additives used were ionics, we may assume the electric charge was determined by the number of ions present in the Iiquid and number adsorbed at the Stern interface. The authors therefore investigated the number of ions adsorbed. The experimental results came extremely close to values predicted from theoretical calculations. KIinkenberg's and Leonard's results also closely match the author's calculation values.","PeriodicalId":367847,"journal":{"name":"1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129973650","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
Behaviour of streamersin liquids under step voltage in point-plane geometry 点平面几何中阶跃电压下液体中流子的行为
1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids Pub Date : 1987-07-27 DOI: 10.1109/14.16520
A. Beroual, C. Marteau, R. Tobazéon
{"title":"Behaviour of streamersin liquids under step voltage in point-plane geometry","authors":"A. Beroual, C. Marteau, R. Tobazéon","doi":"10.1109/14.16520","DOIUrl":"https://doi.org/10.1109/14.16520","url":null,"abstract":"The purpose of this paper is to correlate the charge of streamers in both polarities and the volume of dissolved gases (generated by streamers) determined by chromatography. Preliminary results of spectroscopic studies of the emitted light are presented. The energetic balance shows that vaporization is dominant for slow streamers but ionization could be a possible mechanism. For fast streamers, dissociation and ionization are much likely, vaporization being also present.","PeriodicalId":367847,"journal":{"name":"1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129270861","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: 34
Charge exchange processes at the interface of a metal oxide with a dielectric liquid 在金属氧化物与介电液体界面处的电荷交换过程
1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids Pub Date : 1987-07-27 DOI: 10.1109/14.7322
A. Modinos
{"title":"Charge exchange processes at the interface of a metal oxide with a dielectric liquid","authors":"A. Modinos","doi":"10.1109/14.7322","DOIUrl":"https://doi.org/10.1109/14.7322","url":null,"abstract":"We describe the various processes by which positive ions at the interface of a metal oxide with a dielectric liquid can be neutralised, and their significance in relation to the initiation of breakdown.","PeriodicalId":367847,"journal":{"name":"1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128266424","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
Electroconvection and its effect on heat transfer 电对流及其对传热的影响
1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids Pub Date : 1987-07-27 DOI: 10.1109/14.7338
P. Atten, F. Mccluskey, Alberto T. Pérez
{"title":"Electroconvection and its effect on heat transfer","authors":"P. Atten, F. Mccluskey, Alberto T. Pérez","doi":"10.1109/14.7338","DOIUrl":"https://doi.org/10.1109/14.7338","url":null,"abstract":"The use of electric fields in order to increase heat transfer in fluids dates back some time. One part of the previous work deals with the effects of the dielectric forces resulting from permittivity gradients which are themselves induced by the imposed temperature gradients. The rest of the work is concerned with the Coulomb force which the electric field (E) exerts on the free charge (or space charge) which results from the thermally induced conductivity gradient within the liquid.","PeriodicalId":367847,"journal":{"name":"1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116466001","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: 68
A new expression for the calculation of the solute dipole moment in the concentration range 1 % – 40 % at microwave frequencies 给出了计算微波频率下浓度为1% ~ 40%的溶质偶极矩的新表达式
1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids Pub Date : 1987-07-27 DOI: 10.1109/14.7329
G. Johri, G. Iernetti
{"title":"A new expression for the calculation of the solute dipole moment in the concentration range 1 % – 40 % at microwave frequencies","authors":"G. Johri, G. Iernetti","doi":"10.1109/14.7329","DOIUrl":"https://doi.org/10.1109/14.7329","url":null,"abstract":"A new method for the calculation of the solute dipole moment in the concentration range 1 % - 40 % at microwave frequencies is proposed. It is applied for the analysis of the dielectric data of chloral (CCl3-CHO) in solution in benzene at 9.8 GHz. The concentration dependence of the permittivity is fitted by the equation including linear and quadratic terms of the concentration. The dipole moment of chloral obtained by this method is 7.07×10-3 SI units, a value 36 % higher than the one computed by the Guggenheim static method.","PeriodicalId":367847,"journal":{"name":"1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124904721","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
Helium breakdown near the critical state 氦在临界状态附近分解
1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids Pub Date : 1987-07-27 DOI: 10.1109/14.7350
J. Gerhold
{"title":"Helium breakdown near the critical state","authors":"J. Gerhold","doi":"10.1109/14.7350","DOIUrl":"https://doi.org/10.1109/14.7350","url":null,"abstract":"Liquid or supercritical helium is the basic insulant for superconducting devices. Many efforts have been taken to find out its dielectric strength under various conditions. Paschen's law has been found valid in helium gas down to very low temperatures, as far as the field strength does not exceed 15 to 20 kV/mm1. In liquid and supercritical helium the situation is more complex. Often a large statistical scattering up to nearly one order of magnitude has been found. Most work was concentrated to evaluate a minimum breakdown strength level which can be taken as a base for reliable insulation systems. The minimum breakdown strength of liquid helium is correlated with the dielectric strength of the saturated vapour.","PeriodicalId":367847,"journal":{"name":"1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133035830","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: 10
Effect of streamer shape and dimensions on local electric field conditions 流线形状和尺寸对局部电场条件的影响
1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids Pub Date : 1987-07-27 DOI: 10.1109/14.7339
P. Girdinio, P. Molfino, G. Molinari, A. Viviani, G. FitzPatrick, E. Forster
{"title":"Effect of streamer shape and dimensions on local electric field conditions","authors":"P. Girdinio, P. Molfino, G. Molinari, A. Viviani, G. FitzPatrick, E. Forster","doi":"10.1109/14.7339","DOIUrl":"https://doi.org/10.1109/14.7339","url":null,"abstract":"The knowledge of the local electrical field in the immediate vicinity of the electrode surface is very desirable if one were to understand the charge injection process at an electrode. Many attempts have been made to determine this local field experimentally.[1,3] None of these attempts has so far succeeded in estimating the field in front of the primary streamer which is formed as a result of the charge injection process.","PeriodicalId":367847,"journal":{"name":"1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133539292","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: 18
Streamer generation and propagation in transformer oil under divergent field conditions 变磁场条件下变压器油中拖缆的产生和传播
1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids Pub Date : 1987-07-27 DOI: 10.1109/14.16519
O. Lesaint, R. Tobazéon
{"title":"Streamer generation and propagation in transformer oil under divergent field conditions","authors":"O. Lesaint, R. Tobazéon","doi":"10.1109/14.16519","DOIUrl":"https://doi.org/10.1109/14.16519","url":null,"abstract":"Streamer phenomena of both polarities have been evidenced under AC voltage in various experimental conditions. The use of various tip radiuses of curvature and inter-electrode distances has permitted to investigate a large range of applied voltages, and to check the conditions in which the streamers can or not propagate.","PeriodicalId":367847,"journal":{"name":"1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129640490","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: 117
Dielectric response of material media using the detuning of a resonant microwave cavity 利用谐振微波腔的失谐对材料介质的介电响应
1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids Pub Date : 1987-07-27 DOI: 10.1109/14.7327
J. Roberts, F. Shafer, V. Prakash
{"title":"Dielectric response of material media using the detuning of a resonant microwave cavity","authors":"J. Roberts, F. Shafer, V. Prakash","doi":"10.1109/14.7327","DOIUrl":"https://doi.org/10.1109/14.7327","url":null,"abstract":"The technique of dielectric response of a medium loading a resonant cavity has been used successfully to monitor all phases of matter. In this work results will be given on the dielectric response of bound (vicinal) water in germinating wheat seeds (Fig. 1, 2), the dielectric response of select fluids as they change phase from solid↔liquid (Fig. 3, 4) a discussion will be given of how the technique may be used to monitor phase changes in liquid crystals and other polyphase systems.","PeriodicalId":367847,"journal":{"name":"1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114955575","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
Dielectric integrity associated with circulating insulating fluids 与循环绝缘流体有关的介电完整性
1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids Pub Date : 1987-07-27 DOI: 10.1109/14.7343
J. K. Nelson, M. J. Lee
{"title":"Dielectric integrity associated with circulating insulating fluids","authors":"J. K. Nelson, M. J. Lee","doi":"10.1109/14.7343","DOIUrl":"https://doi.org/10.1109/14.7343","url":null,"abstract":"The behaviour of transformer oil and other fluids used for the cooling and insulation of power system equipment is significantly influenced by enforced motion. Not only can charges generated by streaming electrification1 accumulate to prejudice dielectric integrity, but the dielectric strength of the fluid is also altered per se2 by the actions of the flow in a complex, but predictable, manner. Both these aspects need to be understood to permit informed design and operation of power equipment and appropriate countermeasures.","PeriodicalId":367847,"journal":{"name":"1987 Ninth International Conference on Conduction and Breakdown in Dielectric Liquids","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115335425","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: 5
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