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二重反転形軸流ポンプの内部流れ構造の解明と高性能可変速設計

对旋轴流泵内流结构及高性能变速设计阐释

基本信息

批准号：
23360086
负责人：
古川明徳
金额：
$ 9.4万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2011
资助国家：
日本
起止时间：
2011-04-01 至 2013-03-31
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23360086/
关键词：
流体工学ターボポンプ二重反転形高性能設計流れ計測

项目摘要

将来の高比速度ポンプとして期待される二重反転形軸流ポンプの可変速設計による幅広い流量域での安定高効率・省エネ運転の実現を最終目標に,本年度は,(1)現有する2種の後段動翼の内部流れ計測,(2)後段動翼の異回転数設計・製作,(3)変速制御による高効率運転とその性能予測法の構築を実施した.以下に結果を述べる.(1)後段動翼の内部流れ計測現有する2種の後段動翼(高食違い角・高弦節比・3枚翼と低食違い角・低弦節比・5枚翼)の設計回転数・変速運転時の内部流れをレーザードップラー流速計および5孔プローブにより計測した.(2)後段動翼の異回転数設計・製作(1)で確認された前段動翼出口(後段動翼入口)流れの翼端側の速度欠損をモデル化し,高比速度化において重要なキャビテーション性能の向上を目的に,後段動翼の低回転数化,正の小衝突角化,低食違い角化を考慮した翼素設計を複数実施した.その妥当性を数値流体力学解析により検証し,薄長翼を採用した動翼が揚水性能,効率の両面で好適であることを確認した.この結果を基に,新規後段動翼の製作を次年度より前倒しして実施した.(3)変速制御による高効率運転とその性能予測法の構築幅広い流量域での変速制御の有用性を明らかにすることを目的に,設計回転数時における各動翼性能から変速制御運転時の性能を予測することを試みた.前段動翼の性能は既知の回転数に対する相似則が成立するが,後段動翼の性能は前段動翼出口流れに依存するため同様の相似則が成立しないので,前段動翼の性能予測を性能の相似則から,後段動翼の性能予測を代表回転流面における動翼前後の速度三角形から予測する手法を考案した.性能計測結果との比較により,提案手法の予測精度は定性的には良好であるが特に後段動翼について定量的差異が大きいことが判明したので,実際の内部流れとの比較から今後の改善の可能性を検討した.

In the future, the high specific speed equipment is expected to change the speed of the double anti-profile flow sensor. The flow domain is stable and stable. This year, (1) there is an internal flow meter for the rear section of the moving wing, and (2) the rear section of the moving wing is designed for the number of return signals. (3) the rapid control system is used to measure the performance of the system. The following results describe the performance. (1) the rear wing has a rear wing (high angle, high chord ratio, 3 low angle, low chord ratio, 5 wings). (2) the rear wing of the rear wing (high angle, high chord ratio, 3 low angle, low chord ratio, 5 wings). (2) the rear wing is designed to measure the flow velocity of the rear wing. The number of return cycles is designed to (1) confirm that the front wing exit (rear wing inlet) of the engine is not enough speed at the wing end of the engine. High specific speed, high specific speed, high specific speed, The appropriate number of hydrodynamics, the analysis of hydrodynamics, the use of thin and long wings to improve the performance of water, and the rate of water performance. The results show that in the latter part of the new regulation, the movement wing system is used for the first time in the next year. (3) the speed control system is used to measure the performance of the speed control system in the flow domain. It is useful to understand the performance of the system, and to set the number of cycles to determine the performance of each wing performance and the performance of the speed system. The performance of the front wing is known to be similar, while the exit flow of the rear wing is similar. The performance of the front wing is similar, and the performance of the front wing is similar. The performance of the front wing is similar, and the performance of the rear wing is similar. The results of the performance calculation show that the accuracy of the proposed method is better than that of the qualitative one, and that the quantitative difference of the rear part of the moving wing is not as good as that of the rear part of the mover. the results of the performance evaluation show that the accuracy of the proposed method is better than that of the qualitative analysis of the accuracy, especially the quantitative difference of the rear part of the wing.