From 767f4b0bebc88ae2660b30109ef339f3d903c1f1 Mon Sep 17 00:00:00 2001
From: Thomas Lambert <t.lambert@uliege.be>
Date: Fri, 19 May 2023 11:41:59 +0200
Subject: [PATCH] refact(indvel): more logical place for nBlades
---
src/configs/caradonna1981.m | 2 +-
src/solvers/indvel.m | 6 +++---
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/src/configs/caradonna1981.m b/src/configs/caradonna1981.m
index 8c49f3b..cdc0bd4 100644
--- a/src/configs/caradonna1981.m
+++ b/src/configs/caradonna1981.m
@@ -94,7 +94,7 @@ Airfoil.polarType = 'file'; % Type of polar to use ('file', 'polynomial')
Airfoil.coordFile = 'airfoil_data/naca0012.dat';
% If Airfoil.polarType == 'file'
-Airfoil.polarFile = 'airfoil_data/NACA_0012-Re_2e5-1e7.mat';
+Airfoil.polarFile = 'airfoil_data/NACA_0012-Re_1e5-1e7.mat';
Airfoil.extrapMethod = 'viterna'; % Polar extrapol. ('none', 'spline', 'Viterna')
% ==================================================================================================
diff --git a/src/solvers/indvel.m b/src/solvers/indvel.m
index b7d0423..98e53ff 100644
--- a/src/solvers/indvel.m
+++ b/src/solvers/indvel.m
@@ -89,8 +89,8 @@ function indvel(OpRot, Mod)
dD = coeff2force(cd, OpRot, relVel);
% Thrust and torque contributions
- dFa = dL .* cos(phi) - dD .* sin(phi);
- dFu = dL .* sin(phi) + dD .* cos(phi);
+ dFa = OpRot.Rot.nBlades * (dL .* cos(phi) - dD .* sin(phi));
+ dFu = OpRot.Rot.nBlades * (dL .* sin(phi) + dD .* cos(phi));
% Final system to solve for v and u
vw = OpRot.Op.speed + dFa ./ dmdot ./ K_T;
@@ -125,7 +125,7 @@ function force = coeff2force(coeff, OpRot, speed)
% COEFF2FORCE Convert aerodynamic coefficient to force
rho = OpRot.Op.Flow.rho;
- nondim = OpRot.Rot.nBlades .* (0.5 * rho * OpRot.Rot.Bl.area .* speed.^2);
+ nondim = 0.5 * rho * 2 * pi * OpRot.Rot.Bl.area .* speed.^2;
force = coeff .* nondim;
--
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