Abstract
Modern eating habits depend in large part on the development of food processing technology. Thermal treatments are often performed in the conventional food processing, but it can cause discoloration and loss of nutrients of the food by thermal processing or treatment. On the other hand, food processing using an underwater shock wave has little influence of heat and its processing time is very short, preventing the loss of nutrients. In this research optical observation experiment and the numerical simulation were performed, in order to understand and control the behavior of the underwater shock wave in the development of the processing container using an underwater shock wave for the factory and home. In this experiment a rectangular container was used to observe the behavior of the underwater shock wave. In the experiment, the shock wave was generated by using explosive on the shock wave generation side. The shock wave, which passed through the phosphor bronze and propagated from the aluminum sidewall, was observed on the processing container side. Numerical simulation of an analogous experimental model was investigated, where LS-DYNA software was used for the numerical simulation. The comparative study of the experiment and the numerical simulation was investigated. The behavior of a precursor shock wave from the device wall was able to be clarified. This result is used for development of the device in numerical simulation.
Highlights
Various processing methods of using shock waves generated by explosive and electric power have been studied and developed
The precursor shock wave generated by the shock wave propagated from the phosphor bronze plate to the aluminum sidewall can be confirmed at 20μs
3.3 COMPARISON OF RESULTS What measured the velocity of precursor shock wave, shock wave passes through the phosphor bronze plate and shock wave reflected in the side wall is shown in Fig.16, Fig.17, and Fig
Summary
Various processing methods of using shock waves generated by explosive and electric power have been studied and developed. It is well established that shock wave pressure propagates on a large range and duration of pulse can be long, depending on the processing techniques. In the processing techniques using underwater shock wave, it is difficult to control the underwater shock waves. Numerical Simulation and Experiment for Underwater Shock Wave in Newly Designed Pressure Vessel. An attempt was made to obtain the velocity of the precursor shock wave, shock wave and reflected shock wave. The precursor shock wave propagating through aluminum alloy and underwater shock wave are analyzed in order to understand the behavior of underwater shock wave in the development of the pressure vessel. Numerical simulation was performed to investigate the validity of data, and these results were compared with experimental results
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