Test Data AC1-01: Difference between revisions
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{{AC|front=AC 1-01|description=Description_AC1-01|testdata=Test Data_AC1-01|cfdsimulations=CFD Simulations_AC1-01|evaluation=Evaluation_AC1-01|qualityreview=Quality Review_AC1-01|bestpractice=Best Practice Advice_AC1-01|relatedUFRs=Related UFRs_AC1-01}} | |||
=Aero-acoustic cavity= | =Aero-acoustic cavity= | ||
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=='''Overview of Tests'''== | =='''Overview of Tests'''== | ||
The experimental conditions are described in [[TR-026-20.pdf]]. The full range of tests covers a variety of free-stream Mach numbers between 0.4 and 1.35, and for two cavity configurations, so-called shallow and deep. We concentrate here on a single one of these, namely '''M=0.85 deep cavity'''. | The experimental conditions are described in [[Media:TR-026-20.pdf|TR-026-20.pdf]]. The full range of tests covers a variety of free-stream Mach numbers between 0.4 and 1.35, and for two cavity configurations, so-called shallow and deep. We concentrate here on a single one of these, namely '''M=0.85 deep cavity'''. | ||
Unsteady pressure measurements were recorded by 10 Kulite transducers along the centreline of the rig (which did not coincide with the centreline of the cavity itself), at a sampling rate of 6000Hz. The position of each transducer is given in Table 1. | Unsteady pressure measurements were recorded by 10 Kulite transducers along the centreline of the rig (which did not coincide with the centreline of the cavity itself), at a sampling rate of 6000Hz. The position of each transducer is given in Table 1. | ||
8 | {| border = "1" align="center" | ||
|+ align="bottom" | Table 1 Kulite Transducer Positions | |||
!width="50"|Transducer Number | |||
!width="200"|Distance X from leading edge of cavity (mm) | |||
|- | |||
|align="center"|1||align="center"|25.4 | |||
|- | |||
|align="center"|2||align="center"|76.2 | |||
|- | |||
|align="center"|3||align="center"|127.0 | |||
|- | |||
|align="center"|4||align="center"|177.8 | |||
|- | |||
|align="center"|5||align="center"|228.6 | |||
|- | |||
|align="center"|6||align="center"|279.4 | |||
|- | |||
|align="center"|7||align="center"|330.2 | |||
|- | |||
|align="center"|8||align="center"|381.0 | |||
|- | |||
|align="center"|9||align="center"|431.8 | |||
|- | |||
|align="center"|10||align="center"|482.6 | |||
|} | |||
[{{filepath:AC1-01_M219D085.dat}} M219D085.dat] for the 10 transducer locations are stored using a sampling frequency of 6000 per second, for a total duration of just over 3.4 seconds. The [{{filepath:AC1-01_M219DRMS.dat}} M219DRMS.dat] at these locations are also presented. | |||
M219D085.dat for the 10 transducer locations are stored using a sampling frequency of 6000 per second, for a total duration of just over 3.4 seconds. The M219DRMS.dat at these locations are also presented. | |||
There is no independent verification of the validity/accuracy of the experimental data. | There is no independent verification of the validity/accuracy of the experimental data. | ||
| Line 81: | Line 46: | ||
=='''Test Conditions'''== | =='''Test Conditions'''== | ||
Measurements have been performed on a range of free-stream Mach number, (empty) cavity depths, with and without doors at 90o open (TR-026-20.pdf reports on the latter only). If appropriate, during the duration of the QNET project, a matrix of alternative test conditions against which to benchmark CFD calculations will be provided. | Measurements have been performed on a range of free-stream Mach number, (empty) cavity depths, with and without doors at 90o open ([[Media:TR-026-20.pdf]] reports on the latter only). If appropriate, during the duration of the QNET project, a matrix of alternative test conditions against which to benchmark CFD calculations will be provided. | ||
The specific test case of interest is classed as a deep cavity (L/D = 5) without doors, with flow conditions as follows: | The specific test case of interest is classed as a deep cavity (L/D = 5) without doors, with flow conditions as follows: | ||
| Line 89: | Line 54: | ||
Re = 6.84e6 (based on cavity length of 0.508m) | Re = 6.84e6 (based on cavity length of 0.508m) | ||
P<sub>0</sub> = 99612.06 Pa | |||
P = 62059.14 Pa | P = 62059.14 Pa | ||
T<sub>0</sub> = 305.06 K | |||
Incidence = 0o | Incidence = 0o | ||
| Line 99: | Line 64: | ||
=='''References'''== | =='''References'''== | ||
TR-026-20.pdf Henshaw M.J de C., | [[Media:TR-026-20.pdf|TR-026-20.pdf]] Henshaw M.J de C., “''M219 Cavity'' case in Verification and Validation Data for Computational Unsteady Aerodynamics”, RTO-TR-26, AC/323(AVT)TP/19, October 2000 | ||
© copyright ERCOFTAC 2004 | © copyright ERCOFTAC 2004 | ||
---- | |||
Contributors: Fred Mendonca; Richard Allen - Computational Dynamics Ltd | Contributors: Fred Mendonca; Richard Allen - Computational Dynamics Ltd | ||
Site Design and Implementation: Atkins and UniS | Site Design and Implementation: [[Atkins]] and [[UniS]] | ||
{{AC|front=AC 1-01|description=Description_AC1-01|testdata=Test Data_AC1-01|cfdsimulations=CFD Simulations_AC1-01|evaluation=Evaluation_AC1-01|qualityreview=Quality Review_AC1-01|bestpractice=Best Practice Advice_AC1-01|relatedUFRs=Related UFRs_AC1-01}} | |||
Latest revision as of 14:40, 11 February 2017
Aero-acoustic cavity
Application Challenge 1-01 © copyright ERCOFTAC 2004
Overview of Tests
The experimental conditions are described in TR-026-20.pdf. The full range of tests covers a variety of free-stream Mach numbers between 0.4 and 1.35, and for two cavity configurations, so-called shallow and deep. We concentrate here on a single one of these, namely M=0.85 deep cavity.
Unsteady pressure measurements were recorded by 10 Kulite transducers along the centreline of the rig (which did not coincide with the centreline of the cavity itself), at a sampling rate of 6000Hz. The position of each transducer is given in Table 1.
| Transducer Number | Distance X from leading edge of cavity (mm) |
|---|---|
| 1 | 25.4 |
| 2 | 76.2 |
| 3 | 127.0 |
| 4 | 177.8 |
| 5 | 228.6 |
| 6 | 279.4 |
| 7 | 330.2 |
| 8 | 381.0 |
| 9 | 431.8 |
| 10 | 482.6 |
M219D085.dat for the 10 transducer locations are stored using a sampling frequency of 6000 per second, for a total duration of just over 3.4 seconds. The M219DRMS.dat at these locations are also presented.
There is no independent verification of the validity/accuracy of the experimental data.
Test Conditions
Measurements have been performed on a range of free-stream Mach number, (empty) cavity depths, with and without doors at 90o open (Media:TR-026-20.pdf reports on the latter only). If appropriate, during the duration of the QNET project, a matrix of alternative test conditions against which to benchmark CFD calculations will be provided.
The specific test case of interest is classed as a deep cavity (L/D = 5) without doors, with flow conditions as follows:
M = 0.85
Re = 6.84e6 (based on cavity length of 0.508m)
P0 = 99612.06 Pa
P = 62059.14 Pa
T0 = 305.06 K
Incidence = 0o
References
TR-026-20.pdf Henshaw M.J de C., “M219 Cavity case in Verification and Validation Data for Computational Unsteady Aerodynamics”, RTO-TR-26, AC/323(AVT)TP/19, October 2000
© copyright ERCOFTAC 2004
Contributors: Fred Mendonca; Richard Allen - Computational Dynamics Ltd
Site Design and Implementation: Atkins and UniS