hot-wire spirometer uses a constant temperature anemometer (cta) for its operation. the working principle of cta, used for the measurement of fluid velocity and flow turbulence, is based on convective heat transfer from a hot-wire sensor to a fluid being measured. the calibration curve of a cta is nonlinear and cannot be easily extrapolated beyond its calibration range. therefore, a method for ...

In this experimental study, flow over NACA 4412 airfoil with flexible membrane mounted both on suction surface and pressure was investigated at Reynolds number of 5x10 4 different angles attack. The smoke-wire visualization method used for to demonstrate phenomena as laminar separation bubble (LSB), leading edge tip vortices. A constant temperature anemometer (CTA) measuring the partially airfo...

An adaptive response compensation technique has been proposed to compensate for the response lag of the constant-current hot-wire anemometer (CCA) by taking advantage of digital signal processing technology. First, we have developed a simple response compensation scheme based on a precise theoretical expression for the frequency response of the CCA (Kaifuku et al. 2010, 2011), and verified its ...

Effects of flexible membrane mounted over suction surface NACA 4412 airfoil were experimentally investigated at Reynolds number 5x104 and low aspect ratio (AR=1) in this paper. The smoke-wire visualization method has been performed for flow to demonstrate phenomena as laminar separation bubble (LSB), leading edge z/c=0.4 tip vortices z/c=0.1. Values velocity, stress turbulence statistics measur...

................................................................................................................................ i Acknowledgement ............................................................................................................... ii List of Table ........................................................................................................................ ...