In the article thermo-aerodynamic characteristics of the original design of a heat exchange surface - a flat-oval tube with incomplete corrugated fins, which can be used for the modernization of heat exchange equipment, are studied. The purpose of the work is a preliminary assessment of the efficiency of flat-oval tubes with incomplete corrugated fins and obtaining an empirical dependence for calculation using CFD modeling. The object of the study is forced convection during transverse washing of a composite flat-oval tube with incomplete corrugated fins. The subject of the study is heat transfer and aerodynamics during transverse washing of a composite flat-oval tube with incomplete corrugated fins. In the work, the values of the dimensionless coefficient of heat transfer and pressure loss are obtained, as well as the calculated dependence for determining the coefficient of heat transfer and aerodynamic resistance of the mentioned types of tubes is presented. Data verification was carried out with a smooth tube and a tube with spiral fins. The scientific novelty of the work is the establishment of the fact that flat-oval tubes with incomplete corrugated fins have a higher heat transfer coefficient compared to smooth tubes (by 45 – 50 % in average) and spiral-ribbed tubes (by 25 – 30 % in average) with simultaneous increasing of aerodynamic resistance by 25 – 30 % at the same flow rate of the heat carrier. Practical application of the obtained results allows designers to increase the surface area of heat exchange, which makes these tubes prospective for using in power engineering and industry, in particular, for dry cooling towers of nuclear power plants and thermal power plants, for boiler heat exchangers, for gas turbine installations, etc.