Identification of the dynamics of a flexible delta wing model

This paper details the identification of the dynamics of a flexible delta wing model. The wing model was tested in the low speed dynamic wind tunnel of NAL at three dynamic pressure conditions. The model was aerodynamically excited by driving its trailing edge control surface with sinesweep signals. Time domain time series identification technique was used to identify the flexible wing dynamics from its responses. Lower order models were deduced from the identified higher order models using balanced reduction technique. The identified dynamics showed that the frequency and damping of the dominant mode varied appreciably for the tested dynamic pressure range

Numerical Analysis of Flow through Channels Pertaining to Heat Sink with Flaps

Heat sinks with rectangular channels are generally used to dissipate heat from electronic components. To confirm munch angling heat dissipation of heat, coolant fluid has to be uniformly distributed among the channels of heat sink. In this research work, fluid flow is simulated computationally by using commercially available CFD software through the heat sink with flaps placed at the inlet of the channels. Major objective of this work is to study the effect of geometry of the flap on the uniformity of flow distribution among the channels. Length and inclination of the flap pivoted to the wall of the channel at its inlet are varied along with inlet flow velocity and flow rates in each of the channels are observed. It is observed that longer flaps with smaller angles and shorter flaps with larger angles result in better distribution of flow