Impulse Force Balance for Ultrashort Duration Hypersonic Test Facilities by P. Singh, V. Menezes, K. J. Irimpan, H. Hosseini

“…The accelerometer outputs from the model in the hypersonic freestream were processed using the respective impulse response functions to derive the unknown aerodynamic force and moments. The newly adopted convolution technique has been found very effective for data reduction from accelerometer force balances developed for shock tunnel applications.…”
Get full text

Monitoring air quality in residential areas with low-cost sensors: Santa Cecilia case by Oscar Arnulfo Fajardo-Montaña, Yeimy Alejandra Salinas, Carlos Reyes, Daniel Santiago Becerra-Casas

“…This study evaluates the behaviour of particulate matter with an aerodynamic diameter below 2.5 micrometres (PM2.5) in indoor environments of the Santa Cecilia neighbourhood, relative to outdoor atmospheric concentrations, using custom-designed low-cost sensors. …”
Get full text

Investigation of the Pulsed Annular Gas Jet for Chemical Reactor Cleaning by Zvegintsev Valery Ivanovich, Nalivaichenko Denis Gennadievich, Chirkashenko Vladimir Fedorovich

“…For the solving of the task of reactor internal walls cleaning the pulsed gaseous system was suggested and investigated, which throws circular oxygen jet along surfaces through regular intervals. Study of aerodynamic efficiency of the impulse system was carried by numerical modeling and experimentally with the help of a specially created experimental facility. …”
Get full text

Aeroelastic Stability Analysis of a Laminated Composite Sandwich Panel With a Magnetorheological Fluid Core Under Yawed Supersonic Airflow by Jian Zhou, Liang Li, Minglong Xu

“…The aeroelastic equations for a rectangular sandwich panel (MRF core layer and composite cross-ply laminate constraining and host layers) were established using a MIN3 plate element. Aerodynamic forces for different yawed angles would result in different coupled flutter boundaries of the panel. …”
Get full text

Film Effectiveness Downstream the Trenches with Tilted Target Wall by Fan Yang, Mohammad E. Taslim

“…Numerous film hole geometries have been the subject of investigation by many researchers over the past three decades with the aim of keeping the target wall under the maximum allowable temperature with the least amount of precious cooling air and minimum aerodynamic losses. In this study, we are proposing a new trench geometry that is fed by 30°-inclined embedded circular film holes entering from the trench sidewall. …”
Get full text

Targeting Drug Delivery to the Lungs by Inhalation by C. O'Callaghan

“…To deliver therapeutic agents by inhalation to the lower respiratory tract, inhaled drug particles must have appropriate aerodynamic characteristics. In addition, the anatomy and pathophysiology of the patient's respiratory tract, mode of inhalation through the inhaler, and the characteristics of the inhalational device itself, may significantly affect drug deposition.…”
Get full text

Impact Analysis of Different Trajectory Shapes on Optimization Based on Original Natural Algorithm by Yijing Chen, Ying Nan, Zhihan Li

“…The results showed that the basic state parameters of the spiral trajectory optimized using the improved original natural algorithm after adding constraints met the constraint conditions. The aerodynamic heating rate and overload of the spiral reentry trajectory were to some extent greater than those of the S-type trajectory. …”
Get full text

Liquid Self-Balancing Device Effects on Flexible Rotor Stability by Leonardo Urbiola-Soto, Marcelo Lopez-Parra

“…An analytical model is introduced to study the effects of the active fluid mass fraction on a flexible rotor supported by flexible supports excited by bwo different destabilizing mechanisms; rotor internal friction damping and aerodynamic cross-coupling. It is found that the fluid radial and traverse forces contribute to the balancing action and to improve the rotor stability, respectively.…”
Get full text

Direct Analysis of Low-Volatile Molecular Marker Extract from Airborne Particulate Matter Using Sensitivity Correction Method by Satoshi Irei

“…Analysis of size-segregated PM filter samples showed that their size distributions were found to be in the PM smaller than 0.4 μm aerodynamic diameter. The observations were consistent with our expectation of their possible sources. …”
Get full text

An Investigation on the Effect of Endwall Movement on the Tip Clearance Loss Using Annular Turbine Cascade by Hesham M. El-Batsh, Magdy Bassily Hanna

“…The aerodynamic losses in gas turbines are mainly caused by profile loss secondary flow, and tip leakage loss. …”
Get full text

Treatment Efficacy of Electromyography versus Fiberscopy-Guided Botulinum Toxin Injection in Adductor Spasmodic Dysphonia Patients: A Prospective Comparative Study by Jae Wook Kim, Jae Hong Park, Ki Nam Park, Seung Won Lee

“…We assessed acoustic and aerodynamic voice parameters, and the voice handicap index (VHI) before injection and at 1, 3, and 6 months after injection. …”
Get full text

Dynamic Characteristics of Blade with Viscoelastic Damping Block Based on Complex Eigenvalue Method by Jiao Wang, Yue-hao Zhang, Tao Yu, Qing-kai Han

“…The dynamical equation for a rotational viscoelastic damping block-blade (VE-blade) in a centrifugal force field and aerodynamic force field is established to calculate the dynamical natural frequency and responses of the VE-blade. …”
Get full text

Laser cutting study of zirconium alloys for nuclear decommissioning by Jae Sung Shin, Joonsoo Ock, Sungyeol Choi

“…Analyzing the physical properties of aerosols, both zirconium alloys generated larger particles with a count median aerodynamic diameter of 0.25 μm, which is approximately 15–17 % larger than that of 304 L stainless steel.…”
Get full text

Association between exposure to particulate matter and heart rate variability in vulnerable and susceptible individuals by Yong Whi Jeong, Hayon Michelle Choi, Youhyun Park, Yongjin Lee, Ji Ye Jung, Dae Ryong Kang

“…This study examines PM1.0 (aerodynamic diameters <1 μm), PM2.5 (≥1 μm and <2.5 μm), and PM10 (≥2.5 μm and <10 μm) effects on HRV in patients with environmental diseases as chronic disease groups and vulnerable populations as control groups. …”
Get full text

Research on RBV Control Strategy of Large Angle Maneuver by Jiangtao Xu, Na Luo, Yu Fu, Litong Wang, Xiande Wu

“…Firstly, considering the nonlinear characteristics of aerodynamic coefficients varying with Mach numbers, attack angle, and sideslip angle, the complete nonlinear 6-DOF model of RBV is established. …”
Get full text

Association of ambient air pollutants with blood physiological and biochemical indicators and systemic immune inflammation index in people living around Beijing: an analysis of air... by Bingqian DU, Zhiqiang REN, Peian CHEN, Zhenjun LI

“…Particulate matter with an aerodynamic diameter of less than 10 μm (PM10) concentration was positively correlated with MO# and SIRI, and negatively correlated with mean corpuscular hemoglobin (MCH) and MCHC (all P < 0.01). …”
Get full text

Optimization of Wind Turbine Airfoil Using Nondominated Sorting Genetic Algorithm and Pareto Optimal Front by Ziaul Huque, Ghizlane Zemmouri, Donald Harby, Raghava Kommalapati

“…FLUENT, which is a commercial CFD simulation code, was used to determine the relevant aerodynamic loads. The Lift Coefficient (CL) and Drag Coefficient (CD) data at a range of 0° to 12° angles of attack (α) and at three different Reynolds numbers (Re=68,459, 479, 210, and 958, 422) for all the six airfoils were obtained. …”
Get full text

Dynamic Gust Load Analysis for Rotors by Yuting Dai, Linpeng Wang, Chao Yang, Xintan Zhang

“…The generalized dynamic wake model and Leishman-Beddoes dynamic stall model are applied to calculate the nonlinear unsteady aerodynamic forces on rotors. Then, we transformed the differential aeroelastic governing equation to an algebraic one. …”
Get full text

Flame–Flame Interactions and Jet–Jet Interactions in Gas Turbine Swirl Combustors by Wei Wei, Xin Hui, Xin Xue, Qiang An, Shiyang Yu

“…To reduce these costs during the design phase, researchers often simplify annular combustors into single-dome configurations using aerodynamic and thermodynamic similarity principles. …”
Get full text

The Centrifugal Differential Mobility Analyser – concept and initial validation of a new device for measuring 2D property distributions by T. N. Rüther, D. B. Rasche, D. B. Rasche, H.-J. Schmid

“…An evaluation method to determine the transfer probabilities is developed and used in this work to compare the measurement results with the theory for the pure rotational behaviour (like the Aerodynamic Aerosol Classifier) and the pure electrical behaviour (like the Dynamic Mobility Analyser). …”
Get full text