车用发动机
車用髮動機
차용발동궤
2015年
1期
27-32
,共6页
柴油机%增压器%叶轮%曲面%最小二乘法%数据处理
柴油機%增壓器%葉輪%麯麵%最小二乘法%數據處理
시유궤%증압기%협륜%곡면%최소이승법%수거처리
diesel engine%turbocharger%impeller%surface%least square method%data processing
当前的柴油机增压器叶轮前倾后弯，叶片形状复杂，空间曲率变化大，曲面数据处理复杂。针对这一问题，通过建立简化的数学模型，利用可选择曲面次数的最小二乘法对叶轮曲面离散数据进行处理，借助计算机程序可对大量的离散数据进行处理，得到精度足够的叶轮曲面简化方程及其近似解。这种可选择曲面次数的最小二乘法可以为解决类似实际工程问题提供一种新方法。
噹前的柴油機增壓器葉輪前傾後彎，葉片形狀複雜，空間麯率變化大，麯麵數據處理複雜。針對這一問題，通過建立簡化的數學模型，利用可選擇麯麵次數的最小二乘法對葉輪麯麵離散數據進行處理，藉助計算機程序可對大量的離散數據進行處理，得到精度足夠的葉輪麯麵簡化方程及其近似解。這種可選擇麯麵次數的最小二乘法可以為解決類似實際工程問題提供一種新方法。
당전적시유궤증압기협륜전경후만，협편형상복잡，공간곡솔변화대，곡면수거처리복잡。침대저일문제，통과건립간화적수학모형，이용가선택곡면차수적최소이승법대협륜곡면리산수거진행처리，차조계산궤정서가대대량적리산수거진행처리，득도정도족구적협륜곡면간화방정급기근사해。저충가선택곡면차수적최소이승법가이위해결유사실제공정문제제공일충신방법。
The impeller swept forward and bent backward ,the shape of blade was complex ,the space curvature change was large ,and so the surface data was difficult to process .To solve the previous problems ,a simplified mathematical model was built ,the discrete data of blade surface were processed with the least square method by using the computer and the simplified e‐quation with the high accuracy and its approximate solutions were acquired .Accordingly ,the least square method with adjusta‐ble degrees of polynomial brought a new method for solving the similar engineering problems .
