TURBULENCE SIMULATION METHOD

• Main Authors: KUROSAWA SADAO, UCHIDA TATSUAKI
• Format: Patent
• Language: English; Japanese
• Published: 05.01.2017
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

PROBLEM TO BE SOLVED: To improve accuracy of numeric analysis of a flow field in which a swirl occurs.SOLUTION: A turbulence simulation method according to an embodiment acquires a measurement result of a feature of a turbulence which is measured in a flow field in which a swirl occurs. Then, numeric analysis is performed by using a turbulence model and a first turbulence model coefficient corresponding to the turbulence model, then an analysis result of the feature of the turbulence in the flow field is acquired, then a tolerance between the measurement result and the analysis result is calculated. Then, a prescribed parameter having correlation to the tolerance is designated, then correlation between the tolerance and the parameter is digitized over the whole area of the flow field. Then whole area of the flow field is divided into a first analysis area in which a value of the correlation exceeds a threshold and a second analysis area in which a value of the correlation is equal to or less than the threshold. Then, using the turbulence model, and a second turbulence model coefficient obtained by correcting a value of the first turbulence model coefficient, the feature of the turbulence in the first analysis area is digitized and analyzed.SELECTED DRAWING: Figure 6 【課題】スワールが生じている流れ場の数値解析の精度を向上させる。【解決手段】実施の形態に係る乱流のシミュレーション方法では、スワールの生じる流れ場で測定した乱流の特性の測定結果を取得する。また、乱流モデルと前記乱流モデルに対応した第１の乱流モデル係数とを用いて数値解析を行い、前記流れ場における乱流の特性の解析結果を得る。さらに、測定結果と解析結果との誤差を算出する。次に、誤差に対して相関を持つ所定のパラメータを指定し、流れ場全体の領域にわたって前記誤差と前記パラメータとの相関性を数値化する。次に、流れ場全体の領域を、相関性の値が閾値を超える第１の解析領域と相関性の値が閾値以下の第２の解析領域とに分割する。さらに、乱流モデルと第１の乱流モデル係数の値を補正した第２の乱流モデル係数とを用いて、第１の解析領域における乱流の特性を数値解析する。【選択図】図６