Abstract
This paper describes a development program taking small scale Aerodynamic laboratory experimental technology to full-scale road tests. The fuel saving concept is based on attaching a 135 mm radius, quarter circle cross-section device, to the rear-side of truck-trailers. A full-scale conceptual prototype was designed and characterized by TAU and adopted as a full-scale adjustable and cost-effective prototype by ATDynamics. Bench-top tests at TAU validated the performance of the prototype as sufficient to warrant full-scale test success. Based on the bench-top tests it was decided that full scale inlet pressures of 3–6 psi at flow rates of 1–1.5 L/s per actuator are required. The full-scale prototype device comprised of some 100 suction and oscillatory blowing (SaOB) actuators’ array with a common compressed air supply. A positive displacement pump operated by a gasoline engine supplied the compressed air. As part of an ongoing ATD research project, a series of road tests were performed at the Goodyear Proving Ground, San Angelo, TX. Two identical trucks were tested. One truck-trailer was standard, while the other was equipped with the TAU-ATD device. Gauges located just downstream of the pump and at 5 locations along the supply ducts measured the supply pressures. Portable sensors measured the device suction pressure and pulsed blowing frequency. It was found that the pressure drop in the supply ducts was 10–15 %. However, additional 35 % pressure drop existed in the flexible tubes between the ducts and SaOB actuators. Out of the 81 possible configurations, determined by a 3 by 3 parameter space, 5 configurations were actually tested with valid results. One configuration, measured twice at a driving speed of 65 MPH, provided 5 % increase in fuel economy (not counting the input pump energy). This translates to a 1.75 L/100 km savings or 1 L/100 km taking into account the flow power invested. This improvement was obtained with inlet pressure lower than 4 psi, marginal according to all previous tunnel and bench-top tests. Furthermore, it is still open how close to optimal is this device configuration. With significantly reduced pressure losses, resulting in 5–6 psi inlet pressure at 15 % the current required input energy it is expected that 6–9 % net fuel saving would be obtainable in future road tests, potentially leading to the most compact commercial product to date.
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References
Arwatz, G., Fono, I., Seifert, A.: Suction and oscillatory blowing actuator. In: Morrison, J.E., Birch, D.M., Lavioe, P. (eds.) Proceedings of IUTAM Symposium on Flow Control and MEMS, Sept 2006, pp. 33–44. Springer, London (2008)
Arwatz, G., Fono, I., Seifert, A.: Suction and oscillatory blowing actuator. AIAA J. 40(5), 1007–1017 (2008)
Cattafesta, L.N., Sheplak, M.: Actuators for active flow control. Ann. Rev. Fluid. Mech. 43, (2011)
Collis, S.S., Joslin, R.D., Seifert, A., Theofilis, V.: Issues in active flow control: theory, simulation and experiment. Prog. Aero Sci. V40, N4–5 (2004) (previously AIAA paper 2002–3277)
El-Alti, M., Chernoray, V., Kjellgren, P., Hjelm, L., Davidson L.: Computations and full-scale tests of active flow control applied on a Volvo truck-trailer. In: Dillmann, A. (ed.) Proceedings of the 3rd Heavy Vehicle Drag Reduction Conference (2010)
Englar, R.J.: Advanced aerodynamic device to improve the performance, economics, handling and safety of heavy vehicles. SAE paper 2001-01-2072 (2001)
Heinz, N., King, R., Gölling, B.: Robust closed-loop lift control on an industry-relevant civil aircraft half model. In: King, R. (ed.) Active Flow Control II 2010. NNFM, vol. 108, pp. 125–139. Springer, Heidelberg (2010)
Hsu, T.-Y., Hammache, M., Browand, F.: Base flaps and oscillatory perturbations to decrease base drag. In: Proceedings of the UEF Conference on the Aerodynamics of Heavy Vehicles:Trucks, Buses and Trains, Lecture Notes in Applied and Computational Mechanics, Springer, Heidelberg, Sept 2004
Kehs, J.P., Visser, K.D., Grossman, J., Horell, C., Smith, A.: Experimental and full scale investigation of base cavity drag reduction devices for use on ground transport vehicles. In: Dillmann, A. (ed.) Proceedings of the 3rd Heavy Vehicle Drag Reduction Conference (2010)
McCallen, R.C., Salari, K., Ortega, J., DeChant, L., Hassan, B., Roy, C., Pointer, W.D., Browand, F., Hammache, M., Hsu, T.Y., Leonard, A., Rubel, M., Chatalain, P., Englar, R., Ross, J., Satran, D., Heineck, J.T., Walker, S., Yaste, D., Storms, B.: Doe’s effort to reduce truck aerodynamic drag-joint experiments and computations lead to smart design. AIAA paper, June 2004
Pack Melton, L.G., Yao, C.S., Seifert, A.: Active control of flow separation from the flap of a supercritical airfoil. AIAA J. 44(1), 34–41 (2006) (previously AIAA Paper 2003–4005)
Prandtl, L.: Motion of fluids with very little viscosity. In: Third International Congress of Mathematicians at Heidelberg, 1904, from Vier Abhandlungen zur Hydro-dynamik und Aerodynamik, pp. 1–8, Gottingen, 1927, NACA TM-452, March 1928
Seifert, A., Pack, L.G.: Active control of separated flow on a wall-mounted “hump” at high reynolds numbers. AIAA J. V.40(7), 1363–1372 (2002) (Part of AIAA paper 99–3430)
Seifert, A., Pastuer, S.: Method and mechanism for producing suction and periodic flow. US Patent 2006–0048829-A1. Granted 2005
Seifert, A., Stalnov, O., Sperber, D., Arwatz, A., Palei, V., David, S., Dayan, I., and Fono, I.: Large trucks drag reduction using active flow control. In: McCallen, B. (ed.) Proceedings of the 2nd heavy vehicle drag reduction conference, pp. 115–134. ISBN 978-3-540-85069-4 (2007)
Seifert, A., Stalnov, O., Sperber, D., Arwatz, A., Palei, V., David, S., Dayan, I., Fono, I.: Heavy trucks drag reduction by active flow control. AIAA paper 2008–0743, Jan 2008
Seifert, A., Darabi, A., Wygnanski, I.: Delay of airfoil stall by periodic excitation. J. Aircraft. 33(4), 691–699 (1996)
Traffic safety facts: large trucks. DOT HS 810 619 (2005)
Acknowledgments
The authors would like to thank O. Stalnov, I. Fono, V. Palei, S. Pastuer, A. Blas, A. Kronish, S. Balvis, S. Moshel and M. Vaserman for the great scientific and technical support. The study was supported by AFC Technologies, Israel in collaboration with Ephicas, Delft, NL and managed by RAMOT of Tel Aviv University. Four related patents (one approved and three pending) exist. The road tests were funded in part by grants from New York and California states.
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Seifert, A., Dayan, I., Horrell, C., Grossmann, J., Smith, A. (2016). Heavy Trucks Fuel Savings Using the SaOB Actuator. In: Dillmann, A., Orellano, A. (eds) The Aerodynamics of Heavy Vehicles III. ECI 2010. Lecture Notes in Applied and Computational Mechanics, vol 79. Springer, Cham. https://doi.org/10.1007/978-3-319-20122-1_24
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DOI: https://doi.org/10.1007/978-3-319-20122-1_24
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