本研究主題之目的是要建立目前成大拖航水槽的潛體模型阻力及自推實驗程序技術、比較不同實驗方法優劣、分析後續實驗結果，並與後插式潛體實驗及美國DTMB水槽的公開實驗結果作比較。另一目的在提升成大拖航水槽面對未來潛艦國造之研發設計、實驗需求之應對能力，希望達到可將建立的實驗技術運用在各種潛體模型上，提升成大拖航水槽試驗效能，使其日漸符合國際商業水槽的水準。
成大拖航水槽在水面船舶的各項實驗皆已有一定基礎，然而在潛體方面之研究技術與實驗經驗相對缺乏，因此本研究將承先啟後，嘗試執行大型潛體模型的阻力與自推實驗，量測4.3公尺Suboff潛體模型的流體動力特性，包含阻力、推力、扭矩、推減係數，並做實驗數據之不確定性分析。
根據本研究之結果，中支柱式機構的阻力數據在中速段2.50m/s以下較符合美國DTMB水槽之趨勢，2.50m/s以上因硬體問題使阻力偏大；自推實驗結果顯示該潛體無附屬物情況下推減係數t約介於0.06至0.09。目前的測力機構經砝碼校正後顯示其不確定性較大，同時影響阻力與自推實驗。另外本研究亦與後插式潛體實驗結果比較，顯示目前成大水槽兩種潛體實驗方法在速度大於3.05m/s的中高速段區間，阻力值都較美國DTMB水槽來得大，未來仍需改善。

The purpose of this research is to establish the mechanism of submerged model and perform the experimental procedure including resistance and self-propulsion test in NCKU Towing Tank, and to analyze the results in two experimental method, comparing them with the sting-mounting type and the American DTMB towing tank. The other purpose is to enhance the capacity of R&D and the efficiency of NCKU towing tank, making it increasingly in line with the international towing tank with good reliability.

There has been certain degree of foundation in the equipment and experimental technique of surface ship for NCKU towing tank. However, in the submerged model test, we have few experience and less research technology. To deal with this problem, this research will try to construct the experimental technology including resistance test and self-propulsion test of submerged model, measuring the hydrodynamic data (resistance, thrust, torque, thrust deduction) and analyzing its uncertainty with the Suboff model length 4.3 meters.

According to the results in this research, the resistance data of the middle-strut-type mechanism in the middle speed below 2.50m/s is approximately in line with the trend of the DTMB Towing Tank, while in the higher speed more than 2.50m/s is gradually larger because of the hardware problem. The self-propulsion data show that the thrust deduction is between 0.06 and 0.09 with a bare hull model. The mechanism of force measurement was calibrated and showed its high uncertainty which led to high impact of resistance and self-propulsion test. Besides, both the resistance results of sting-mounting type and middle-strut type become larger than DTMB in the higher speed more than 3.05m/s.

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