Showing papers in "Chinese Journal of Aeronautics in 2018"

TL;DR: In this paper, the authors present a comprehensive literature review on three active cooling methods, i.e., regenerative cooling, film cooling, and transpiration cooling, including the fluids flow, heat transfer, and thermal cracking characteristics of different hydrocarbon fuels.

TL;DR: This study draws on the idea of time geography, and turns the research focus of CD&R from TP to an analysis of the aircraft reachable space constrained by 4D waypoint constraints and a novel pre-CD&R scheme for multiple aircraft.

TL;DR: Simulation results indicate that the proposed novel algorithm could exhibit higher accuracy and faster convergence compared with the multiplicative extended Kalman filter, the unscented quaternion estimator, and the adaptive robust unscenting Kalman Filter.

TL;DR: In this paper, the authors used DBD plasma actuation to anti-ice on a NACA0012 airfoil model with a chord length of 53.5 cm in a closed-circuit icing wind tunnel.

TL;DR: A novel adaptive fast fixed-time sliding mode guidance law to intercept maneuver targets at a desired impact angle from any initial heading angle, with no problems of singularity and chattering, is designed.

TL;DR: In this article, a stochastic degradation model considering imperfect maintenance activities is firstly constructed based on the diffusion process, then, the Probability Density Function (PDF) of the RUL is derived by the convolution operator under the concept of First Hitting Time (FHT).

TL;DR: In this paper, the main functions, parameters and issues related to thermal expansion and sputter erosion of ion thrusters are described, and a review of ion optics used for significant launched and tested ion engines since 1970 is presented.

TL;DR: Good agreements between simulation results and experimental data suggest that the numerical model is capable of predicting the dynamic responses of various aircraft structures under a bird strike, and numerical simulation can be used as a tool to design bird-strike-resistant aircraft structures.

TL;DR: The new design optimization system converges faster and it takes 1/3 of the total time of traditional optimization to converge to a better design, thus significantly reducing the overall optimization time and improving the efficiency of conventional global design optimization method.

TL;DR: A new Pressure Distribution Guided (PDG) method is developed to enable better pressure distribution manipulation while maintaining optimization efficiency and its design results and efficiency on airfoil optimization test cases are compared with those obtained using other methods.

TL;DR: In this article, the authors investigated the reason for the poor dynamic characteristic of an EHA from the perspectives of the natural frequency characteristic and the power requirement, and proposed several methods to improve the dynamic performance of the EHA.

TL;DR: In this article, the authors investigated the mechanism of stall and surge in a centrifugal compressor with a variable vaned diffuser, where the diffuser blade setting angle can be adjusted.

TL;DR: In this paper, the effects of non-smooth constraint on the flexible rotor's modal characteristics by theoretical and experimental methods are investigated. But the results reveal that the non-mooth constraint produced by the intermittent rub-impact will increase the modal frequencies and critical speeds of the rotor system significantly.

TL;DR: In this article, an open access article distributed under Creative Commons Attribution-Non-Commercial-NoDerivatives 4.0 International license (CC BY-NC-ND 4.4.0)

TL;DR: In this paper, an annular rocket-type combustor without a nozzle was designed to investigate rotating detonation combustion in liquid Nitrogen Tetroxide (NTO) and liquid MonoMethylHydrazine (MMH).

TL;DR: A complete training effectiveness evaluation method is proposed to evaluate the trainees’ training effect based on virtual simulation in this paper and an experiment and the analysis were carried out to validate the evaluation method.

TL;DR: A saturated approach is adopted to guarantee the global asymptotic stability under control input saturation and a nonlinear disturbance observer is constructed to compensate the disturbances caused by inertial parameter uncertainty and unmodeled dynamics.

TL;DR: In this article, a sparse grid-based polynomial chaos (SGPC) expansion is used to do uncertainty quantification and sensitivity analysis for stochastic aerodynamic analysis considering geometric and operational uncertainties.

TL;DR: This paper proposes an efficient coordinated Dubins path planning method to synchronize the arrival time of all engaged missiles in the mid-course flight to generate fast and accurate salvo attack.

TL;DR: In this paper, the performance of a two-electrode plasma synthetic jet actuator array in serial is investigated experimentally, and high-speed photography of the discharge evolution, voltage-current measurement, and shadowgraphy visualization are used in the investigation.

TL;DR: In this paper, the airfoil broadband noise reduction with wavy leading edge under anisotropic incoming turbulence is investigated and the results show that the wavy leads edge increases the lift and drag whereas the lift fluctuations are substantially reduced.

TL;DR: A multi-index assessment method based on index weight using entropy weight method and analytic hierarchy process is proposed and designs and experimental results show that the established coverage characteristic model and the proposed assessment method are effective and right.

TL;DR: Based on an optimal control concept, an online optimization based control method with input constraints considered is proposed and simulation results show that the controller can be used to control the tiltrotor throughout its operating envelop which includes a transition flight, and can also deal with vertical gust disturbances.

TL;DR: A multistep RBF method based on a multilevel subspace RBF algorithm is presented to further improve the efficiency of the mesh deformation method and is efficient and robust in dealing with large deformation problems over complex geometries.

TL;DR: In this article, an experimental study was made to investigate the film cooling performance of imperfect holes due to in-hole blockage over a flat plate, where a specifically pyramid-shaped element was used to simulate the inhole blockages.

TL;DR: In this article, in-plane mixed mode-I/II fatigue crack growth simulations and experiments are performed for the Al 7075-T651 aluminum alloy which is widely used in the aerospace industry.

TL;DR: The simulation results reveal that the proposed adaptive controller achieves better transient response and more robust performance than classic Model Reference Adaptive Control (MRAC) method, even with serious actuator saturation.

TL;DR: In this paper, the authors reviewed the recent developments and future trends of using the Particle Image Velocimetry (PIV) technique for combustion measurements, and summarized the promising prospects and further development requirements of PIV measurements in combustion flow fields.

TL;DR: In this article, the effects of inlet swirl and mass flow ratio on traditional film cooling holes arrangement and a new arrangement pattern whose holes are located along the isobars were investigated.

TL;DR: In this paper, an improved numerical method that can construct Halo/Lissajous orbits in the vicinity of collinear libration points in a full solar system model is investigated.