The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Bogdan Niemczewski - One of the best experts on this subject based on the ideXlab platform.
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Solvents for Ultrasonic Cleaning
Plating and Surface Finishing, 2020Co-Authors: Bogdan NiemczewskiAbstract:The withdrawal of freons from Ultrasonic Cleaning in industry imposed by the Montreal Protocol and limitations for using chlorinated solvents, though not included in the Protocol but harmful to human health, have led to greater than expected difficulties in finding effective solvents. A substantial problem exists because all non-halogenated solvents are inflammable and thus are more or less fire hazardous. Presented here are the results of testing four high flash point solvents as to their applicability in Ultrasonic Cleaning. Three of them have acoustic properties sufficient for use in Ultrasonic Cleaning, but the fourth one proved to be unacceptable.
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influence of concentration of substances used in Ultrasonic Cleaning in alkaline solutions on cavitation intensity
Ultrasonics Sonochemistry, 2009Co-Authors: Bogdan NiemczewskiAbstract:Abstract Cavitation intensity vs. temperature of aqueous solutions of three substances most frequently used in Ultrasonic Cleaning: sodium carbonate, metasilicate and phosphate were measured. Shapes of cavitation – temperature curves for 0–10% solutions during heating and cooling in the 20–70 °C temperature range were compared. Maximal cavitation intensity curves for these solutions at 60 °C (most frequently used temperature of Ultrasonic Cleaning in aqueous solutions), in identical conditions and at various ultrasound frequencies are presented as diagrams.
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Influence of concentration of substances used in Ultrasonic Cleaning in alkaline solutions on cavitation intensity
Ultrasonics Sonochemistry, 2009Co-Authors: Bogdan NiemczewskiAbstract:Cavitation intensity vs. temperature of aqueous solutions of three substances most frequently used in Ultrasonic Cleaning: sodium carbonate, metasilicate and phosphate were measured. Shapes of cavitation - temperature curves for 0-10% solutions during heating and cooling in the 20-70 °C temperature range were compared. Maximal cavitation intensity curves for these solutions at 60 °C (most frequently used temperature of Ultrasonic Cleaning in aqueous solutions), in identical conditions and at various ultrasound frequencies are presented as diagrams. © 2008 Elsevier B.V. All rights reserved.
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Estimation of the suitability of selected organic solvents for Ultrasonic Cleaning
Ultrasonics Sonochemistry, 1999Co-Authors: Bogdan NiemczewskiAbstract:The intensity of cavitation versus temperature and the intensity of agitation of liquid caused by the pressure of Ultrasonic radiation have been compared for traditional chlorinated solvents and freons used in Ultrasonic Cleaning, and for 10 selected solvents offered by various companies as substitutes. Recommendations have been formulated as regards the possibility of using these solvents in industrial Ultrasonic Cleaning.
Yingzhan Jiang - One of the best experts on this subject based on the ideXlab platform.
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Development method of the motor winding’s Ultrasonic Cleaning equipment
International Conference on Graphic and Image Processing (ICGIP 2012), 2013Co-Authors: Yingzhan Jiang, Caiyuan Wang, Chenyang Ao, Haipeng ZhangAbstract:The complicate question’s solution of motor winding Cleaning need new technologies such as Ultrasonic Cleaning. The mechanism of problems that the insulation level of the motor winding would be degraded with time and the motor winding would resumed tide soon after processing were analyzed. The Ultrasonic Cleaning method was studies and one Ultrasonic Cleaning device was designed. Its safety was verified by the destructive experiment. The test show that this device can clear away the depositional dirt in the winding thoroughly, which provides a new idea and method to ensure its insulation level and realize its safe and reliable operation.
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ICDMA - Study on the Processing Methods of Aluminum Foil Measurement Signals for Ultrasonic Cleaning Parameters
2011 Second International Conference on Digital Manufacturing & Automation, 2011Co-Authors: Baoji Yuan, Yingzhan JiangAbstract:The signals of aluminum foil measurement results for Ultrasonic Cleaning device Parameters need accurate test and estimate by effectively signal processing methods. The characteristics of aluminum foil measurement methods are analyzed. An area assessment method and corrosion degree of the aluminum foil is put forward. The evaluation program was given and the appLication of aluminum foil measure methods was studied. It is demonstrated by the experimental study that this measurement method by aluminum foil can reaLize the study on the time characteristics of the Ultrasonic Cleaning machine, selection of the frequency mode of action and study on the temperature characteristics, which provided an effective data support and experimental verification for the performance parameters design of the Ultrasonic Cleaning machine.
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Study on the Processing Methods of Aluminum Foil Measurement Signals for Ultrasonic Cleaning Parameters
2011 Second International Conference on Digital Manufacturing & Automation, 2011Co-Authors: Baoji Yuan, Yingzhan JiangAbstract:The signals of aluminum foil measurement results for Ultrasonic Cleaning device Parameters need accurate test and estimate by effectively signal processing methods. The characteristics of aluminum foil measurement methods are analyzed. An area assessment method and corrosion degree of the aluminum foil is put forward. The evaluation program was given and the appLication of aluminum foil measure methods was studied. It is demonstrated by the experimental study that this measurement method by aluminum foil can reaLize the study on the time characteristics of the Ultrasonic Cleaning machine, selection of the frequency mode of action and study on the temperature characteristics, which provided an effective data support and experimental verification for the performance parameters design of the Ultrasonic Cleaning machine.
Haipeng Zhang - One of the best experts on this subject based on the ideXlab platform.
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Development method of the motor winding’s Ultrasonic Cleaning equipment
International Conference on Graphic and Image Processing (ICGIP 2012), 2013Co-Authors: Yingzhan Jiang, Caiyuan Wang, Chenyang Ao, Haipeng ZhangAbstract:The complicate question’s solution of motor winding Cleaning need new technologies such as Ultrasonic Cleaning. The mechanism of problems that the insulation level of the motor winding would be degraded with time and the motor winding would resumed tide soon after processing were analyzed. The Ultrasonic Cleaning method was studies and one Ultrasonic Cleaning device was designed. Its safety was verified by the destructive experiment. The test show that this device can clear away the depositional dirt in the winding thoroughly, which provides a new idea and method to ensure its insulation level and realize its safe and reliable operation.
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Study on the measuring method of aluminum foil for Ultrasonic Cleaning machine
International Conference on Graphic and Image Processing (ICGIP 2012), 2013Co-Authors: Chenyang Ao, Haipeng Zhang, Kuoting WangAbstract:To the question that it was hard to measure and verify the design rationality of the performance parameters for the Ultrasonic Cleaning machine, the measuring technology was presented by aluminum foil, and it analyzed feasibility and an area assessment method for the measurement method by aluminum foil. The corrosion degree of the aluminum foil was also put forward. It was demonstrated by the experimental study that this measurement method by aluminum foil could realize the study on the time characteristics of the Ultrasonic Cleaning machine, selection of the frequency mode of action and study on the temperature characteristics, which provided an effective data support and experimental verification for the performance parameters design of the Ultrasonic Cleaning machine.
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Study on the Safety Design and Test Method of Ultrasonic Cleaning Device for the Motor Winding
Advanced Materials Research, 2011Co-Authors: Haipeng Zhang, Xin Gang ChenAbstract:When the dirt was Cleaning away by the Ultrasonic Cleaning device, the insulating layer of the motor winding would be destroyed and the motor safety would be affect. The destructive effect mechanism is analyzed, a enameled wire-based destructive experiment method was designed. Finally the selection of Cleaning power and time were realized. It was indicated by the motor experiments that the Cleaning parameters selected in this way didn’t destroy the insulating layer of the motor winding, and was an excellent method to ensure the safety and reliability of the designed Ultrasonic Cleaning method.
Mark Daniel G. De Luna - One of the best experts on this subject based on the ideXlab platform.
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Ultrasonic Cleaning of polytetrafluoroethylene membrane fouled by natural organic matter
Journal of Membrane Science, 2016Co-Authors: Chi Chuan Kan, Divine Angela D. Genuino, Kim Katrina P. Rivera, Mark Daniel G. De LunaAbstract:Chemical Cleaning of membranes fouled by natural organic matter (NOM) generates secondary pollution. In this study, the effect of Ultrasonic Cleaning of polytetrafluoroethylene (PTFE) membrane fouled by pre-coagulated humic acid-bentonite mixture was investigated. Results show that chemical coagulation prior to microfiltration improved turbidity and TSS removals by 9.5% and 11.4%, respectively. Experimental data fitted to constant pressure filtration models determined the sequence of dominant fouling mechanism as follows: (i) membrane resistance-limited, (ii) pore blocking resistance-limited, and (iii) cake formation resistance-limited. Relative membrane permeability of 53 and flux recovery of 45% were achieved when continuous Ultrasonic Cleaning was done at a 2.0. cm probe distance, 25. min total Cleaning time, 15. mg/L coagulant dose, and 15. W Ultrasonic power. Ultrasonic Cleaning was found to be more effective than hydraulic Cleaning in terms of flux recovery. Compared to chemical Cleaning, it is a competitive and safer alternative in mitigating NOM-induced fouling.
B. Niemczewski - One of the best experts on this subject based on the ideXlab platform.
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Chemical support of cavitation intensity in Ultrasonic Cleaning
Transactions of The Institute of Metal Finishing, 2020Co-Authors: B. Niemczewski, Z. KołodziejczykAbstract:In processes of Ultrasonic Cleaning in aqueous alkaline solutions, due to the intensity of the chemical reactions occurring during Cleaning, it is advisable to use high temperatures. But the intensity of cavitation, being the main causative agent of Cleaning in these liquids, reduces with increasing temperature. Moreover, a great reduction in cavitation intensity is observed when a liquid is heated compared with its intensity when the same liquid is cooling. This phenomenon disturbs the process of Cleaning when the temperature is kept constant. It is also known that a high cavitation intensity in water may be sustained by adding a substance that fixes the oxygen dissolved in the water. In the present work, a method of stabilising cavitation intensity is proposed by adding such a substance, i.e. sodium sulphite, to aqueous alkaline solutions used in Ultrasonic Cleaning.
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On using mixtures of liquids for Ultrasonic Cleaning
Transactions of The Institute of Metal Finishing, 2020Co-Authors: B. NiemczewskiAbstract:The effects of mixing various liquids on the acoustic properties of the resultant mixtures are discussed. These properties are Ultrasonic radiation pressure that induces the agitation of liquids in Ultrasonic cleaners and Ultrasonic cavitation. Both these physical phenomena are direct causative agents of Ultrasonic Cleaning.
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Intensity of hydrodynamic movements induced by ultrasounds in Ultrasonic Cleaning in water solutions
Transactions of The Institute of Metal Finishing, 2020Co-Authors: B. NiemczewskiAbstract:The main causative agent of Ultrasonic Cleaning is cavitation. A helpful factor is liquid movement induced by ultrasound, but in some organic solvents, the intensity of this movement is so high that its significance for the process of Cleaning is equal to and sometimes even higher than the significance of cavitation. In the present work, the intensity of hydrodynamic movement induced by ultrasound in water was assessed and compared with those in selected organic solvents used in Ultrasonic Cleaning.
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Influence of acid concentration on cavitation intensity in Ultrasonic Cleaning in aqueous solutions of acids
Transactions of The Institute of Metal Finishing, 2020Co-Authors: B. NiemczewskiAbstract:It is known from the practice of Ultrasonic Cleaning that in most cases the increase in concentration of an alkaline solution used for Ultrasonic Cleaning leads to lower cavitation intensity, a primary causative agent of efficient Ultrasonic Cleaning. On the other hand, there is no information as regards cavitation intensity trends with increasing concentration of acid solutions. In order to check the influence of concentration (from 1 to 7% w/w) on cavitation intensity, the maximum cavitation of three acids (orthophosphoric, tartaric and citric) was measured under the same conditions at 50 and 60°C in Ultrasonic cleaners operating at 34, 35·5, 36·7, 40 and 44 kHz. The resulting data did not confirm, unlike most alkaline Cleaning solutions, that increasing the concentration of acid solutions above 3% w/w, the concentration most frequently used, reduced cavitation intensity. An exception was the operation of tartaric acid at 40 kHz.
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dependence of cavitation intensity on ultrasound frequency in Ultrasonic Cleaning processes in alkaline solutions
Transactions of The Institute of Metal Finishing, 2008Co-Authors: B. NiemczewskiAbstract:AbstractThe relationship of cavitation intensity with temperature in the range from 20 to 70°C for three alkaline substances most frequently used in Ultrasonic Cleaning was measured in two identical medium size cleaners, the only difference being the frequency of emitted ultrasounds. Peak values of cavitation intensities of solutions at 60°C (most frequent temperature of Ultrasonic Cleaning) were compared. Electrical power consumption values at this temperature were also compared.
