プロペラの単独性能試験法

Independent performance test method for propeller

Abstract

(57)【要約】 【目的】 高いレイノルズ数でのプロペラのスラスト及 びトルクを容易に求められるようにする。 【構成】 高速回流水槽1における試験筒部8の流場に プロペラ10,11を同心に設けて回転させ、該プロペ ラ10,11の前進速度に見合う流入速度と回転数を与 え、プロペラ後流側に当該プロペラから、そのプロペラ 直径Dと略同一の距離位置Aからプロペラ直径の略2倍 (2D)の距離位置Bまでの間に試験筒部8の1以上の 断面で計測を行うようにした無接触型流速計15を配置 して流入速度V 0 に軸方向誘導速度W a が加わったプロペ ラ後流の軸方向速度と、回転方向誘導速度W t とを計測 し、計測したプロペラ後流の軸方向速度と、回転方向誘 導速度W t からプロペラ翼抗力を補正した運動量理論式 によりプロペラ10,11のスラスト及びトルクを高い 精度で求める。
PURPOSE: To allow easy determination of thrust and torque of propeller at high Reynolds number. CONSTITUTION: Propellers 10, 11 are arranged concentrically in the flow field at the test cylinder section 8 of a high flow rate water tank 1 and the propellers 10, 11 are rotated. Number of revolutions and flow-in speed corresponding to the advancing speed of the propellers 10, 11 are then imparted. A noncontact current meter 15 is disposed in the downstream of propeller between a position A separated from the propeller by a distance substantially equal to the diameter D of propeller and a position B separated from the propeller by substantially two times (2D) of the diameter of propeller in order to measure the axial speed in the downstream of propeller which is the sum of a flow-in speed V 0 and an axial induction speed W a , and an induction speed W t in the rotational direction. Thrust and torque of the propellers 10, 11 are then determined highly accurately from the axial speed in the downstream of propeller and the induction speed W t in the rotational direction thus measured according to a theoretical formula of momentum in which drag of propeller blade is corrected. COPYRIGHT: (C)1994,JPO&Japio

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    JP-2010038556-AFebruary 18, 2010Mitsubishi Heavy Ind Ltd, 三菱重工業株式会社プロペラの圧力変動推定装置及び方法並びにプログラム