A117 液滴衝撃ージョン評価法(配管減肉(液滴衝撃ージョン),OS-6 保全・設備診断技術(2),一般講演,地球温暖化防止と動力エネルギー技術)

概要

論文の詳細を見る
Liquid droplet impingement erosion (LDI) is defined as an erosion phenomenon caused by high-speed droplet attack in a steam flow. In a power plant, pipe wall thinning by LDI is observed steam piping system. Because LDI usually occur very locally and is difficult to detect, a prediction of LDI location is required for the safety of the plant system. Therefore, as ultimate objectives, we set the development of the prediction tool of LDI location that can use in power plants easily (LDI Prediction Code). In previous researches, we achieved to enable the evaluation of all the local flow conditions that affect LDI materially. Therefore, in this study, we tried to suggest the evaluation method for LDI position with organizing the results and knowledge systematically. As a result, we suggested the evaluation method of LDI location in steam piping with 3 steps. And we also suggested the function of LDI sensitivity with incorporating the velocity, wetness and droplet behavior, and tested this system to the steam piping model. We found that the consideration of the droplet behavior change the rank of LDI sensitivity at each elbo in the piping.
社団法人日本機械学会の論文
2008-06-18