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게시일: 2012. 12. 26 오전 12:44:34
1. ICSV 2013 일정
1-1 Key Dates
1-2 Budget
경비 (단위 $, $1= 1072.961원, 항공료 제외)
2. LES 논문 Structure
Fig. 1. NACA0012 Cp at AOA=0 computed by XFOIL
Fig. 2. NACA0012 Cp at AOA=0 computed by XFOIL
1-1 Abbreviation
ZPG: zero pressure gradient
APG: adverse pressure gradient
PPS: point pressure spectrum
1-2 Goal
ZPG, APG에 의한 효과를 포함하는 PPS modeling
1-3 Simulations
Targets
LES#1 - NACA0012, AOA=0, chord=0.6096m, span=0.46m, U=69.5 m/s
(for validation by comparison with Brook's 1981 paper)
LES#2 - NACA0012, AOA=4, chord=0.6096m, span=0.46m, U=69.5 m/s
(for comparison of PPS under ZPG(pressure side) and APG(suction side))
Conditions
Temperature = 20 °C
Density, rho = 1.205 kg/m3, Kinematic visconsity, nu = 1.511e-5 m2/s
Speed of sound, c = 343.6 m/s
RE# = U*chord/nu = 2,803,917 ~ 3 millions
M# = U/c = 0.202
Grid info.
chord=0.6096m, span=0.15*chord m, dz=0.002, nz=75
Total elements : 5051989
Total nodes : 4938708
y+_RANS: min: 3.99413 max: 100.898 average: 59.3396
3. HHI project structure
1-1 Aerodynamic simulation using XFOIL
Theory
Program structure
Input data
Output data - Cp mapping
1-2 Aerodynamic noise prediction using Lowson formula
Theory
Program structure
Input data
Output data - Tonal infrasound (OBL, G-weighting)
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