LIU, Peng ;CAI, Jinglun ;JIN, Hui ;YIN, Yibing ;KANG, Ludi ;CHEN, Xian .
Study on the Trade-off Mechanism Between Flow Field Uniformity and Turbulent Pressure Pulsations in Back-Pressure Matching for Supersonic Wind Tunnels.
Articles in Press, [S.l.], v. 0, n.0, p. , march 2026.
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/study-on-the-trade-off-mechanism-between-flow-field-uniformity-and-turbulent-pressure-pulsations-in-back-pressure-matching-for-supersonic-wind-tunnels/>. Date accessed: 30 may. 2026.
doi:http://dx.doi.org/.
Liu, P., Cai, J., Jin, H., Yin, Y., Kang, L., & Chen, X.
(0).
Study on the Trade-off Mechanism Between Flow Field Uniformity and Turbulent Pressure Pulsations in Back-Pressure Matching for Supersonic Wind Tunnels.
Articles in Press, 0(0), .
doi:http://dx.doi.org/
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author = {Peng Liu and Jinglun Cai and Hui Jin and Yibing Yin and Ludi Kang and Xian Chen},
title = {Study on the Trade-off Mechanism Between Flow Field Uniformity and Turbulent Pressure Pulsations in Back-Pressure Matching for Supersonic Wind Tunnels},
journal = {Articles in Press},
volume = {0},
number = {0},
year = {0},
keywords = {Supersonic wind tunnel; Backpressure matching; Flow field uniformity; Pressure pulsation; Shear layer; },
abstract = {Supersonic wind tunnel testing is a critical step in validating the aerodynamic configuration of aircraft. The uniformity of the flow field within the test chamber and the turbulence pressure pulsations are core factors in evaluating flow field quality and influencing the reliability of test data. This study proposes a rapid back-pressure matching method based on Reynolds-Averaged Navier-Stokes (RANS) equations and the SST k-ω turbulence model. This method enables swift determination of the optimal back-pressure value Pm (achieving ideal expansion state when the jet centerline Mach number deviation is <5%). Multi-scale numerical simulations (RANS and LES) demonstrate that the ideal expansion state expands the uniform core region by 23% and reduces velocity pulsation standard deviation to 3.4%. Conversely, back pressure mismatch generates periodic shock waves, resulting in up to 18% total pressure loss. The study found that the ideal expansion state, characterized by the absence of shock interference and a broader core region, allows the shear layer turbulence to develop most fully, resulting in greater pressure pulsation intensity compared to the back-pressure mismatch state. The study uncovers a critical trade-off between flow uniformity and pressure pulsation intensity: suppressing turbulence via shock waves reduces pressure pulsations in the test cell but sacrifices 7~15% flow uniformity. This informs a scenario-specific testing strategy: prioritize ideal expansion conditions for high-precision tests, while allowing moderate backpressure mismatch for scenarios sensitive to pressure pulsations.},
issn = {0039-2480}, pages = {}, doi = {},
url = {https://www.sv-jme.eu/article/study-on-the-trade-off-mechanism-between-flow-field-uniformity-and-turbulent-pressure-pulsations-in-back-pressure-matching-for-supersonic-wind-tunnels/}
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Liu, P.,Cai, J.,Jin, H.,Yin, Y.,Kang, L.,Chen, X.
0 March 0. Study on the Trade-off Mechanism Between Flow Field Uniformity and Turbulent Pressure Pulsations in Back-Pressure Matching for Supersonic Wind Tunnels. Articles in Press. [Online] 0:0
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%A Kang, Ludi
%A Chen, Xian
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%9 Supersonic wind tunnel; Backpressure matching; Flow field uniformity; Pressure pulsation; Shear layer;
%! Study on the Trade-off Mechanism Between Flow Field Uniformity and Turbulent Pressure Pulsations in Back-Pressure Matching for Supersonic Wind Tunnels
%K Supersonic wind tunnel; Backpressure matching; Flow field uniformity; Pressure pulsation; Shear layer;
%X Supersonic wind tunnel testing is a critical step in validating the aerodynamic configuration of aircraft. The uniformity of the flow field within the test chamber and the turbulence pressure pulsations are core factors in evaluating flow field quality and influencing the reliability of test data. This study proposes a rapid back-pressure matching method based on Reynolds-Averaged Navier-Stokes (RANS) equations and the SST k-ω turbulence model. This method enables swift determination of the optimal back-pressure value Pm (achieving ideal expansion state when the jet centerline Mach number deviation is <5%). Multi-scale numerical simulations (RANS and LES) demonstrate that the ideal expansion state expands the uniform core region by 23% and reduces velocity pulsation standard deviation to 3.4%. Conversely, back pressure mismatch generates periodic shock waves, resulting in up to 18% total pressure loss. The study found that the ideal expansion state, characterized by the absence of shock interference and a broader core region, allows the shear layer turbulence to develop most fully, resulting in greater pressure pulsation intensity compared to the back-pressure mismatch state. The study uncovers a critical trade-off between flow uniformity and pressure pulsation intensity: suppressing turbulence via shock waves reduces pressure pulsations in the test cell but sacrifices 7~15% flow uniformity. This informs a scenario-specific testing strategy: prioritize ideal expansion conditions for high-precision tests, while allowing moderate backpressure mismatch for scenarios sensitive to pressure pulsations.
%U https://www.sv-jme.eu/article/study-on-the-trade-off-mechanism-between-flow-field-uniformity-and-turbulent-pressure-pulsations-in-back-pressure-matching-for-supersonic-wind-tunnels/
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Liu, Peng, Jinglun Cai, Hui Jin, Yibing Yin, Ludi Kang, & Xian Chen.
"Study on the Trade-off Mechanism Between Flow Field Uniformity and Turbulent Pressure Pulsations in Back-Pressure Matching for Supersonic Wind Tunnels." Articles in Press [Online], 0.0 (0): . Web. 30 May. 2026
TY - JOUR
AU - Liu, Peng
AU - Cai, Jinglun
AU - Jin, Hui
AU - Yin, Yibing
AU - Kang, Ludi
AU - Chen, Xian
PY - 0
TI - Study on the Trade-off Mechanism Between Flow Field Uniformity and Turbulent Pressure Pulsations in Back-Pressure Matching for Supersonic Wind Tunnels
JF - Articles in Press
DO -
KW - Supersonic wind tunnel; Backpressure matching; Flow field uniformity; Pressure pulsation; Shear layer;
N2 - Supersonic wind tunnel testing is a critical step in validating the aerodynamic configuration of aircraft. The uniformity of the flow field within the test chamber and the turbulence pressure pulsations are core factors in evaluating flow field quality and influencing the reliability of test data. This study proposes a rapid back-pressure matching method based on Reynolds-Averaged Navier-Stokes (RANS) equations and the SST k-ω turbulence model. This method enables swift determination of the optimal back-pressure value Pm (achieving ideal expansion state when the jet centerline Mach number deviation is <5%). Multi-scale numerical simulations (RANS and LES) demonstrate that the ideal expansion state expands the uniform core region by 23% and reduces velocity pulsation standard deviation to 3.4%. Conversely, back pressure mismatch generates periodic shock waves, resulting in up to 18% total pressure loss. The study found that the ideal expansion state, characterized by the absence of shock interference and a broader core region, allows the shear layer turbulence to develop most fully, resulting in greater pressure pulsation intensity compared to the back-pressure mismatch state. The study uncovers a critical trade-off between flow uniformity and pressure pulsation intensity: suppressing turbulence via shock waves reduces pressure pulsations in the test cell but sacrifices 7~15% flow uniformity. This informs a scenario-specific testing strategy: prioritize ideal expansion conditions for high-precision tests, while allowing moderate backpressure mismatch for scenarios sensitive to pressure pulsations.
UR - https://www.sv-jme.eu/article/study-on-the-trade-off-mechanism-between-flow-field-uniformity-and-turbulent-pressure-pulsations-in-back-pressure-matching-for-supersonic-wind-tunnels/
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title = {Study on the Trade-off Mechanism Between Flow Field Uniformity and Turbulent Pressure Pulsations in Back-Pressure Matching for Supersonic Wind Tunnels},
journal = {Articles in Press},
volume = {0},
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TY - JOUR
AU - Liu, Peng
AU - Cai, Jinglun
AU - Jin, Hui
AU - Yin, Yibing
AU - Kang, Ludi
AU - Chen, Xian
PY - 2026/03/27
TI - Study on the Trade-off Mechanism Between Flow Field Uniformity and Turbulent Pressure Pulsations in Back-Pressure Matching for Supersonic Wind Tunnels
JF - Articles in Press; Vol 0, No 0 (0): Articles in Press
DO -
KW - Supersonic wind tunnel, Backpressure matching, Flow field uniformity, Pressure pulsation, Shear layer,
N2 - Supersonic wind tunnel testing is a critical step in validating the aerodynamic configuration of aircraft. The uniformity of the flow field within the test chamber and the turbulence pressure pulsations are core factors in evaluating flow field quality and influencing the reliability of test data. This study proposes a rapid back-pressure matching method based on Reynolds-Averaged Navier-Stokes (RANS) equations and the SST k-ω turbulence model. This method enables swift determination of the optimal back-pressure value Pm (achieving ideal expansion state when the jet centerline Mach number deviation is <5%). Multi-scale numerical simulations (RANS and LES) demonstrate that the ideal expansion state expands the uniform core region by 23% and reduces velocity pulsation standard deviation to 3.4%. Conversely, back pressure mismatch generates periodic shock waves, resulting in up to 18% total pressure loss. The study found that the ideal expansion state, characterized by the absence of shock interference and a broader core region, allows the shear layer turbulence to develop most fully, resulting in greater pressure pulsation intensity compared to the back-pressure mismatch state. The study uncovers a critical trade-off between flow uniformity and pressure pulsation intensity: suppressing turbulence via shock waves reduces pressure pulsations in the test cell but sacrifices 7~15% flow uniformity. This informs a scenario-specific testing strategy: prioritize ideal expansion conditions for high-precision tests, while allowing moderate backpressure mismatch for scenarios sensitive to pressure pulsations.
UR - https://www.sv-jme.eu/article/study-on-the-trade-off-mechanism-between-flow-field-uniformity-and-turbulent-pressure-pulsations-in-back-pressure-matching-for-supersonic-wind-tunnels/
Liu, Peng, Cai, Jinglun, Jin, Hui, Yin, Yibing, Kang, Ludi, AND Chen, Xian.
"Study on the Trade-off Mechanism Between Flow Field Uniformity and Turbulent Pressure Pulsations in Back-Pressure Matching for Supersonic Wind Tunnels" Articles in Press [Online], Volume 0 Number 0 (27 March 2026)
