翼型的中弧线为翼型上下表面y向高度中点的连线。中弧线的y向坐标 Yf(x)称为弯度函数。
机翼的上表面与下表面距离之间一半的点连线称为 中弧线 (mean camber line)或 弧线 (camber line)。而 弧度 (camber,又称弯度),是弧线与 翼弦线间最大的距离。
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Fristly, reviews cubic spline curve of interpolation on the surveying data, then obtain the central arced curve of the blade section, correct the central arced curve with least square method, at last calculate various geometric parameters of the blade.
首先对测绘数据进行三次样条密集插值,然后求出叶型的中弧线,并通过最小二乘法对中弧线进行修正,最后得出叶型的各项几何参数。
参考来源 - 转/静交界面处理方法研究及涡轮结构与气动分析Some importantalgorithms involved in blade surface reconstruction are studied. A method forcomputing skeleton curve of blade cross-section by means of offset curves is given.
针对叶身曲面重建过程中的一些关键问题,本文提出了一系列重要算法,主要包括中弧线提取算法、前后缘高精度拟合算法以及截面线离散时的近似弧长参数离散方法等。
参考来源 - 点云数据抗噪处理方法及其在叶片重建中的应用研究·2,447,543篇论文数据,部分数据来源于NoteExpress
本文研究了自由翼的翼型的几何特征,表明它们的中弧线都具有反折的特点;
The geometry of airfoils, which is proper for the free-wings, was numerically investigated and the results indicated that the airfoils must be featured by the S-shaped camber.
本文提出轴流涡轮不等栅距板式喷嘴直叶片的造型计算方法。首先确定切向平面上的叶型中弧线、叶厚和不等栅距。
This article is intended to provide a method for the profile-calculating of unequally pitched nozzle plate straight blades in the axial-flow turbine.
在图2中,转移是通过带有事件注释的弧线、可选的条件以及将要执行的动作来反映的。
In Figure 2, a transition is reflected by an arc with annotations for the event, an optional condition, and the action to be performed.
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