Wind Field and Aerodynamic Data for Low-Rise Building in Downburst-like Experimental Flows (ERIES-TFCA - Volume 2)

Description

This research investigates fundamental flow around rectangular bluff bodies in atmospheric boundary layer (ABL), downburst (DB), and DB and ABL combined flows. The study focuses on three types of bluff bodies: a horizontally-extruded rectangular cylinder (like the internation benchmark model, BARC), a high-rise rectangular prism (like the CAARC standard tall building), and a Low-Rise Building (with similar cross-section dimensions to the CAARC standard). These body types can be regarded as fundamental models for studying structures such as long span bridges and buildings of varying heights. The project involves pressure measurements and Particle Image Velocimetry (PIV) of the flow around and in the near wake of these bluff bodies. The expected outcome is an improved capability in the prediction of the wind loads associated with downburst-like flows.

S4. 1-400 Low-Rise Building (LRB)

1:400 LRP pressure model. A low-rise rectangular prism, 2L x 3L x 2L, where the model height 2L = 112.5 mm. 32 pressure taps are distributed along 5 pressure rings along the vertical direction. Additionally, 25 pressure taps are placed on the top face of the prism. This body type can be regarded as a fundamental model for studying low-rise buildings.

E1. Downburst-like Wind

This experiment involves testing the 1-400 Scale Low-Rise Building pressure model under various simulated downburst flow profiles and strengths. The model was positioned 320 cm downwind from the center of the turntable facing the 60-fan wall (r_jm = 3.2 m, φ = 180°). In addition, the radial position of the impinging jet (r_jet) was varied relative to the model to achieve r_jm/D = 0.8, 1.0, 1.2, 1.4, and 1.6, only the downburst strength was varied for these positions. The model was tested with relative angles of 0, 30, 45, 60, and 90 degrees depending on the r_jm/D position.

E2. Atmospheric Boundary Layer (ABL) Flow

This test involved the 1-400 Scale Low-Rise Building pressure model subjected to ABL flow at a wind speed of approximately 10 m/s. The model was positioned 320 cm downwind from the center of the turntable facing the 60-fan wall (r_jm = 3.2 m, φ = 180°). In addition, the model was tested with relative angles of 0, 10, 20, 30, 40, 45, 50, 60, 70, 80, and 90 degrees.

E3. Downburst-like and ABL Flow Combined

This experiment involves testing the 1-400 Scale Low-Rise Building pressure model subjected to various downburst simulations involving combinations of impinging jet outflows and an ABL head wind of approximately 4-5m/s, generated from the 60-fan wall.  The model was positioned 320 cm (r_jm/D = 1.0) radially from the center of the turntable at angles of φ = 180°. In addition, the model was tested with relative angles of 0, 45, and 90 degrees.

S6. 1-200 Low-Rise Building (LRB)

This specimen is like specimen S4 but with a model height of 2L = 225mm representing the CAARC LRP building at the scale of 1:200.

E1. Downburst-like Wind

This experiment involves testing the 1-200 Scale Low-Rise Building pressure model under various simulated downburst flow profiles and strengths. The model was positioned 320 cm downwind from the center of the turntable facing the 60-fan wall (r_jm = 3.2 m, φ = 180°). In addition, the radial position of the impinging jet (r_jet) was varied relative to the model to achieve r_jm/D = 1.0, and 1.2, only the downburst strength was varied for these positions. The model was tested with relative angles of 0, 45, and 90 degrees depending on the r_jm/D position.

E2. Atmospheric Boundary Layer (ABL) Flow

This test involved the 1-200 Scale Low-Rise Building pressure model subjected to ABL flow at a wind speed of approximately 10 m/s. The model was positioned 320 cm downwind from the center of the turntable facing the 60-fan wall (r_jm = 3.2 m, φ = 180°). In addition, the model was tested with relative angles of 0, 45, and 90 degrees.

E3. Downburst-like and ABL Flow Combined

This experiment involves testing the 1-200 Scale Low-Rise Building standard pressure model subjected to various downburst simulations involving combinations of impinging jet outflows and an ABL head wind of approximately 4-5m/s, generated from the 60-fan wall.  The model was positioned 320 cm (r_jm/D = 1.0) radially from the center of the turntable at angles of φ = 180°. In addition, the model was tested with relative angles of 0, 45, and 90 degrees.

S7. PIV Profile Measurements (PRF)

This specimen is supplementary to specimen 1. While specimen 1 captures point measurements in a vertical plane utilizing TFI cobra probes, this specimen captures flow field measurements utilizing the PIV system. A high-frequency laser was focused and split through a cylindrical lens into a thin laser sheet. Fog machines were used to seed the entire test chamber with long lasting fog fluid, and finally synchronized high-resolution cameras (flares) were used to capture laser light refraction. Flares send image data to the DVR Express Cores during test measurements.

E1. Downburst-like Wind

This experiment involves capturing various simulated downburst flow fields in a vertical plane. Depending on the instrumentation setup, the field coverage varies.

E2. Atmospheric Boundary Layer (ABL) Flow

This experiment involves capturing a single simulated ABL flow field with an approximate wind speed of 10 m/s. Depending on the instrumentation setup, the field coverage varies.

E3. Downburst-like and ABL Flow Combined

This test involved capturing a vertical flow field for a single downburst simulation involving combinations of impinging jet outflows and an ABL head wind of approximately 4-5m/s, generated from the 60-fan wall.

S9. 1-400 LRB PIV

This specimen is like specimen S4 but with black painted external surfaces and without pressure taps. PIV measurements were taken in a streamwise vertical plane at the model centre. A high-frequency laser was focused and split through a cylindrical lens into a thin laser sheet, fog machines were used to seed the entire test chamber with long lasting fog fluid, and finally synchronized high-resolution cameras (flares) were used to capture laser light refraction. Flares send image data to the DVR Express Cores during test measurements.

E1. Downburst-like Wind

This experiment involves testing the static 1-400 Low-Rise Building PIV model under a single simulated downburst flow profile. The model was positioned 320 cm (r_jm/D = 1.0) downwind from the center of the turntable facing the 60-fan wall (r_jm = 3.2 m, φ = 180°).

E2. Atmospheric Boundary Layer (ABL) Flow

This test involved the 1-400 Low-Rise Building PIV model subjected to ABL flow at a wind speed of approximately 10 m/s. The model was positioned 320 cm downwind from the center of the turntable facing the 60-fan wall (r_jm = 3.2 m, φ = 180°).

E3. Downburst-like and ABL Flow Combined

This test involved the 1-400 Low-Rise Building PIV model subjected to a single downburst simulation involving combinations of impinging jet outflows and an ABL head wind of approximately 4-5m/s, generated from the 60-fan wall.  The model was positioned 320 cm (r_jm/D = 1.0) radially from the center of the turntable at angles of φ = 180°.

S10. 1-200 LRB PIV

This specimen is like specimen S6 but with black painted external surfaces and without pressure taps. PIV measurements were taken in a streamwise vertical plane at the model centre. A high-frequency laser was focused and split through a cylindrical lens into a thin laser sheet, fog machines were used to seed the entire test chamber with long lasting fog fluid, and finally synchronized high-resolution cameras (flares) were used to capture laser light refraction. Flares send image data to the DVR Express Cores during test measurements.

E1. Downburst-like Wind

This experiment involves testing the static 1-200 Low-Rise Building PIV model under various simulated downburst flow profiles. The model was positioned 320 cm (r_jm/D = 1.0) downwind from the center of the turntable facing the 60-fan wall (r_jm = 3.2 m, φ = 180°).

E2. Atmospheric Boundary Layer (ABL) Flow

This test involved the 1-200 Low-Rise Building PIV model subjected to ABL flow at a wind speed of approximately 10 m/s. The model was positioned 320 cm downwind from the center of the turntable facing the 60-fan wall (r_jm = 3.2 m, φ = 180°).

E3. Downburst-like and ABL Flow Combined

This test involved the 1-200 Low-Rise Building PIV model subjected to a single downburst simulation involving combinations of impinging jet outflows and an ABL head wind of approximately 4-5m/s, generated from the 60-fan wall.  The model was positioned 320 cm (r_jm/D = 1.0) radially from the center of the turntable at angles of φ = 180°.

Series Information

This dataset is Volume 2 of 3, which together form the complete dataset for ERIES-TFCA.

Volume one includes datasets S0, S1, S3, and S5.

Volume two includes datasets S0, S4, S6, S7, S9, and S10.

Volume three includes datasets S0, S1, S2, S7, and S8.