This study provides a detailed analysis of the aerodynamic performance various airfoil configurations, focusing on lift coefficient, stall characteristics, and maximum lift-to-drag ratio. The investigation includes NACA23012C profile configurations with different step geometries, ranging from one-step to five-step designs. Experimental measurements were conducted using well-equipped laboratory, Institute Aviation Engineering Technology (IAET), Giza, Egypt. lab features wind tunnel, propeller...

Rationalizing power consumption is crucial in air conditioning and refrigeration design. This study focuses on improving the coefficient of performance (COP) by applying pulsating flow. Experimental trials compared continuous counter flow to parallel flow, showing a 10% reduction fluid temperature with 20% Sensible water heat rejection increased 10.03% 19.78% respectively. Overall transfer improved 57.5% 75% Effectiveness 4.55% 10.6%, while COP 4.52% 13.4% research demonstrates potential...

An application for accurate and low-cost force velocity control of a pneumatic actuator, which can be used in any circuit, is described this paper. Control cylinder proposed via pulsating flow technique. The technique uses on/off solenoid coils the direction valves lieu expensive servo controllers, such as proportional directional valves. Pulsating air frequencies 1.5, 3, 4.5 Hz are applied by designed circuit to investigate inlet constant pressures ranging from 1.72 5.17 × 105 Pa. speed rod...

Recently there has been a great concern in applying active airflow control to Small wind turbine blade airfoils improve the aerodynamic characteristics. One of these novel methods is application pulsed air jets. The current study involved experimental investigation effect pulse flow on performance parameters NACA 0012 airfoil at Reynolds number (Re) range from 0.5 × 10 5 1.4 . was studied frequencies 3, 6, and 9 Hz while keeping suction pressure −1200 Pa. results were compared standard clean...

One of the succeeded methods to enhance performance horizontal axis wind turbine (HAWT) is an attaching a winglet blades tip. The current paper study effect four key parameters that are used describe on which height H%R, cant angle θ, twist β, and taper ratio Λ. A five design cases for each geometric were numerically investigated using computational fluid dynamics (CFD) by ANSYS18.1 software, totally give twenty different response. validation present model with reference experimental results...

Abstract Pneumatic motors have several advantages and many robotics automation applications. The importance of the study is that it a cheap possible way to apply fixed displacement pneumatic with simple directional control valve used. purpose addition any traditional change motor be variable speed torque compared expensive systems such as proportional in industrial also included validated simulations using Automation Studio program motor’s torque. In addition, results showed remarkable...

Pulsate flow is an effective technique applied for cooling several engineering systems depending on their pulsate frequency. One very sound external pulsation application heat transfer over heated bodies. In present work, experimental design and numerical model of controlled pulsating according to generated frequency wave shape around a cylinder were performed. The effects frequency, amplitude, mean velocity the fluid characteristics studied. varied from 2 12 Hz, amplitude 0.2 0.8 m/s....

The paper presents results on heat transfer from a cylinder in pulsating flow. Experimental setup and numerical study of flow inside channel with different incoming velocity forms the presence heated are performed. oscillatory two-dimensional pipes were simulated using Ansys software. This aims to investigate cooling behavior subjected an unsteady air find optimum frequency amplitude which maximize transfer.

Purpose Fire door should withstand a high temperature without deforming. In the current paper, challenges of improving behaviour conventional fire were described using various internal stiffeners in pair swinging-type door. Design/methodology/approach The distribution on outside surface was measured with distributed eight thermocouples. Subsequently side cooled pressurized water hose jet stream 4 bar. transient simulation for thermal and structure analysis conducted finite element modelling...

Scour is one of the most important natural phenomena that directly affect safety water structures.Scour formed due to vortices formation in flow river and open channels.It also works move materials from bottom banks watercourse near bridge structures.The main objective this paper study pier shape effect on minimizing consequently scouring.To achieve objective, experiments were carried out using a flume Imbaba Flight Institute Hydraulic Laboratory, Egypt.Five different shapes piers with...

Abstract Pneumatic motors have several advantages over electric and many robotics automation applications. However, the performance control of pneumatic is not satisfactory mainly due to air compressibility high cost conventional methods using proportional valves. This paper presents an unprecedented application motor a pulsating compressed technique. The study also included validated simulations Automation Studio program motor’s speed torque. results showed clear noticeable improvement in...